- United States
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
- Ukraine
- United Kingdom
- Italy
- Poland
- Australia
- Spain
- New Zealand
- France
- Germany
TOP 30 Client focused legal service in New York, NY
1498 results found
A convenient service for searching for businesses, places and services
The Law Office of Xin Michael Jin, Esq.
The Law Office of Xin Michael Jin, Esq. is a reputable legal institution located at 1333 Stony Brook Road in Stony Brook, New York. Led by experienced attorney Xin Michael Jin, the firm offers a wide range of legal services to clients in the United States. With a focus on professionalism, integrity, and personalized attention, the team at this law office is dedicated to providing top-notch legal representation and advice to individuals and businesses alike. Whether you are in need of assistance with estate planning, real estate transactions, or civil litigation, you can trust The Law Office of Xin Michael Jin, Esq. to handle your case with skill and expertise.
Ahmedi Law Office- Erisa Qyra Ahmedi, Esq.
Ahmedi Law Office, led by Erisa Qyra Ahmedi, Esq., is a reputable law firm located at 25 Melville Park Road in Melville, New York. Specializing in various legal matters, the office provides expert legal services with a focus on professionalism, integrity, and dedication to client satisfaction. Whether you are in need of legal advice, representation, or guidance, Ahmedi Law Office is committed to serving your legal needs with the highest level of expertise and care. Contact us today for a consultation and let us help you navigate through your legal issues.
Law Office of Shawn B. Pratt
The Law Office of Shawn B. Pratt is a reputable legal firm located at 3304 Franklin Avenue in Millbrook, New York, United States. Specializing in various areas of law, including personal injury, criminal defense, family law, and estate planning, our experienced team is dedicated to providing top-notch legal services to our clients. With a focus on personalized attention and effective representation, we strive to achieve the best possible outcomes for those we serve. Contact us today to schedule a consultation and see how we can assist you with your legal needs.
Fertig & Fertig
Fertig & Fertig is a reputable law firm located at 108-14 Cross Bay Boulevard in New York, United States. Specializing in various areas of law, their team of experienced lawyers provide expert legal advice and representation to clients in need. With a commitment to excellence and a dedication to achieving the best possible outcomes for their clients, Fertig & Fertig is a trusted institution in the legal community. Whether you are facing a personal injury case, need assistance with real estate transactions, or require criminal defense representation, Fertig & Fertig is here to help. Contact them today to schedule a consultation and learn more about how they can assist you with your legal needs.
Law Office of Jonathan Victor PLLC
The Law Office of Jonathan Victor PLLC is a trusted legal firm located in Pawling, New York. Specializing in various areas of law, including family law, criminal defense, and personal injury, our experienced team is dedicated to providing top-notch legal representation to our clients. With a focus on personalized attention and strategic advocacy, we strive to achieve the best possible outcomes for each case. Contact us at 88 New York 22 to schedule a consultation with our skilled attorneys.
Teahan Vincent L
Teahan Vincent L is a respected law firm located on Washington Avenue in Millbrook, New York, United States. Specializing in various areas of law, their team of experienced lawyers provide expert legal advice and representation to clients in need. With a commitment to professionalism and client satisfaction, Teahan Vincent L is dedicated to helping individuals and businesses navigate the complexities of the legal system. Trustworthy, reliable, and knowledgeable, they are the go-to institution for all your legal needs.
Mc Laughlin & Stern LLP
Mc Laughlin & Stern LLP is a prestigious law firm located at 3304 Franklin Avenue in Millbrook, New York. With a team of experienced attorneys, they offer a wide range of legal services to individuals and businesses. Specializing in various areas of law, including corporate law, real estate law, and estate planning, Mc Laughlin & Stern LLP is dedicated to providing top-notch legal representation and personalized attention to their clients. Whether you are facing a complex legal issue or simply need guidance on a legal matter, you can trust Mc Laughlin & Stern LLP to provide expert advice and advocacy.
Su Caso
Su Caso is a reputable law firm located at 100-17 Northern Boulevard in New York, United States. Specializing in various legal matters, their team of experienced lawyers is dedicated to providing top-notch legal services to their clients. Whether you are in need of representation for a personal injury case, criminal defense, or family law matter, Su Caso is committed to fighting for your rights and achieving the best possible outcome for your case. With a track record of success and a client-focused approach, Su Caso is the go-to institution for all your legal needs.
Salerno & Rothstein
Salerno & Rothstein is a reputable financial institution located at 221 Schultz Hill Road in Pine Plains, New York, United States. With a focus on providing top-notch financial services, Salerno & Rothstein offers a wide range of expertise in investment management, retirement planning, estate planning, and more. Their team of experienced professionals is dedicated to helping clients achieve their financial goals and secure their future. Whether you are looking to grow your wealth, plan for retirement, or protect your assets, Salerno & Rothstein is committed to providing personalized solutions tailored to your individual needs. Visit their office in Pine Plains today to start your journey towards financial success.
Schaeffer Fred W
Schaeffer Fred W is a reputable law firm located at 31 Quaker Hill Road in Pleasant Valley, New York. Specializing in various legal matters, their team of experienced lawyers provide top-notch legal services to clients in the United States. With a focus on professionalism and client satisfaction, Schaeffer Fred W is dedicated to helping individuals and businesses navigate the complexities of the legal system. Contact them today for expert legal representation.
Michael LoGiudice, LLP
Michael LoGiudice, LLP is a law firm located in Brewster, New York, dedicated to helping accident victims throughout the Hudson Valley area. With a focus on personal injury cases, the firm fights for the rights of those who have been injured due to the negligence of others. Attorney Michael LoGiudice has years of experience in recovering millions of dollars in damages for his clients through negotiated settlements or at trial. The firm handles a wide range of personal injury cases, including those involving fractures, head injuries, burns, organ damage, and more. They work closely with clients to ensure they receive just compensation for their injuries, whether through economic damages for financial losses or noneconomic damages for pain and suffering.
Cory A. Levine, Esq.
Cory A. Levine, Esq. is a reputable law firm located at 1834 U.S. 6 in Carmel Hamlet, New York, United States. Specializing in Real Estate Law, Probate & Wills, and Business Law, the institution is known for its experienced and professional legal services. Whether you are looking to buy a new home, plan your estate, or navigate business regulations, Cory A. Levine, Esq. can provide expert guidance and representation. With a commitment to excellence and a focus on client satisfaction, this institution is a trusted resource for legal matters in the Carmel Hamlet area.
Law Offices of Norman Gershon
The Law Offices of Norman Gershon is a reputable law firm located at 60 June Road in North Salem, New York. Specializing in various areas of law, including criminal defense, family law, and personal injury cases, the firm is dedicated to providing top-notch legal representation and guidance to clients in need. With a focus on professionalism, integrity, and personalized attention, the team at the Law Offices of Norman Gershon is committed to achieving the best possible outcomes for their clients. Whether you are facing a legal issue or seeking legal advice, you can trust in the expertise and experience of the lawyers at this esteemed institution.
The Law Office of Rex M. Pietrobono
The Law Office of Rex M. Pietrobono, located at 2 Sarles Street in Mount Kisco, New York, offers experienced legal representation for DWI, traffic tickets, and criminal defense cases. With over 30 years of experience, Rex Pietrobono is known for his strong legal defenses against drunk driving, speeding tickets, and criminal charges. As a former prosecutor, he understands the nuances of building a case from both sides and strives to provide strategic defense for each unique case. Rex Pietrobono is dedicated to helping individuals who have made mistakes and finds solutions to potentially suppress evidence, dismiss charges, or reduce penalties. He also specializes in defending youthful offenders and has a network of colleagues throughout New York to fight traffic tickets. With a focus on guiding clients through the complexities of the legal system, Rex Pietrobono is committed to achieving the best possible outcomes for those facing criminal prosecution.
Law Offices of Paolo Conte PLLC
The Law Offices of Paolo Conte PLLC, located at 118 North Bedford Road in Mount Kisco, New York, is a trusted institution specializing in asset protection and wealth transfer strategies. With a focus on providing personalized and detailed legal counsel, clients can feel confident in making informed decisions. Paolo Conte, the lead attorney, is known for his knowledge, preparation, and ability to simplify complex legal matters for his clients. Whether it's estate planning or other legal services, Paolo and his team ensure that every detail is accounted for, giving clients peace of mind. With a reputation for patience, courtesy, and expertise in estate planning, Paolo Conte PLLC is a top choice for individuals and families looking for reliable legal representation. Contact them at their Mount Kisco location or their New York City office at One Grand Central Place for expert legal guidance.
Weil, Gotshal & Manges LLP
Weil, Gotshal & Manges LLP is a prestigious law firm located at 767 5th Avenue in New York, New York, United States. The firm is known for its exceptional legal services and strategic business advice, serving as trusted advisors to clients on their most critical issues. Recent accolades include the passing of Corporate Governance Legend Ira M. Millstein, the recognition of Drew Tulumello as one of "America's Top 200 Lawyers" by Forbes, and Elizabeth S. Weiswasser being named "Intellectual Property Litigator of the Year" at the 2024 Benchmark Litigation U.S. Awards. Annemargaret Connolly was also honored at the DC Appleseed Center for Law and Justice 2024 Gala.
Gigliotti Lisa M
Gigliotti Lisa M is a reputable law firm located at 107 New York 376 in Hopewell Junction, New York. Specializing in various areas of law, including but not limited to family law, estate planning, and real estate transactions, Gigliotti Lisa M is dedicated to providing expert legal advice and representation to clients in the United States. With a focus on personalized service and a commitment to achieving the best possible outcomes for their clients, Gigliotti Lisa M is a trusted choice for those in need of legal assistance.
Frank J. Peters, Esq.
Frank J. Peters, Esq. is a prestigious law firm located at 268 U.S. 202 in New York, United States. Specializing in a wide range of legal services, the firm is led by experienced attorney Frank J. Peters who is dedicated to providing high-quality representation to his clients. With a reputation for excellence and a commitment to achieving the best possible outcomes, Frank J. Peters, Esq. is the go-to choice for individuals and businesses in need of legal assistance in the New York area.
The Law Office of Keith R. Murphy
The Law Office of Keith R. Murphy, located at 73 Gleneida Avenue in Carmel Hamlet, New York, is a reputable institution specializing in criminal defense, particularly in cases involving DWI, DWI/DUI, and DWAI charges. Serving clients across Putnam & Westchester, Dutchess, and Orange Counties, attorney Keith R. Murphy is dedicated to providing personalized and tailored assistance to each client. With a focus on professionalism and integrity, the firm helps clients navigate the complexities of their cases with skill and expertise. Testimonials from satisfied clients speak to Keith Murphy's dedication, honesty, and commitment to achieving the best possible results for his clients. If you have been arrested or accused of a crime, it is crucial to seek legal representation as soon as possible, and the Law Office of Keith R. Murphy is here to help.
Maccarini Anthony G
The Law Office of Maccarini Anthony G, located at 1699 U.S. 6 in Carmel Hamlet, New York, has been providing legal services since 1981. Attorney Anthony Maccarini holds a Bachelor of Science Degree from Boston College and a Juris Doctor degree from St. John’s University School of Law. With extensive experience in divorce, family law, real estate, contract, collection, and civil litigation cases, Anthony Maccarini is known for being a fair yet tough advocate for his clients. Most of his clients are referrals from satisfied former clients, showcasing his ability to achieve satisfactory results. Maccarini offers reasonable hourly rates and flexible appointment hours to accommodate the needs of individuals and businesses in Putnam, Dutchess, and Westchester Counties. The firm provides knowledgeable and thorough legal representation with a personal touch, focusing on divorce, family law, real estate, and civil litigation matters. Clients appreciate the kindness, dignity, and expertise shown by the team at Maccarini Anthony G, with a commitment to keeping clients informed and involved throughout the legal process.
Greenberg & Greenberg
Greenberg & Greenberg is a reputable law firm located at 4 East Court Street in Hudson, New York. With a focus on providing top-notch legal services, the firm is known for its dedication to achieving the best outcomes for their clients. Specializing in various areas of law, including personal injury, family law, and real estate, the team at Greenberg & Greenberg is committed to delivering professional and compassionate representation. Whether you are facing a complex legal issue or simply need guidance on a legal matter, Greenberg & Greenberg is here to help. Contact them today to schedule a consultation and see how they can assist you with your legal needs.
Whitbeck Benedict & Smith LLP
Whitbeck Benedict & Smith LLP is a prestigious law firm located at 436 Union Street in Hudson, New York. With a team of experienced and dedicated lawyers, they provide a wide range of legal services to clients in the United States. Specializing in various areas of law, including family law, estate planning, and criminal defense, Whitbeck Benedict & Smith LLP is committed to providing top-notch legal representation and achieving the best possible outcomes for their clients. Whether you are facing a complex legal issue or simply need legal advice, you can trust Whitbeck Benedict & Smith LLP to provide expert guidance and support.
Connor & Connor
Connor & Connor is a reputable law firm located at 76 Green Street in Hudson, New York. Specializing in various legal matters, the team at Connor & Connor is dedicated to providing top-notch legal services to their clients. With a focus on professionalism, expertise, and personalized attention, Connor & Connor is committed to helping individuals and businesses navigate the complexities of the legal system. Whether you are in need of legal advice, representation, or advocacy, you can trust the experienced lawyers at Connor & Connor to handle your case with skill and integrity. Contact them today to schedule a consultation and see how they can assist you with your legal needs.
Law Office of Gordon B. Fine
The Law Office of Gordon B. Fine is a reputable legal institution located at 1940 Commerce Street in Yorktown Heights, New York. Specializing in various areas of law, Gordon B. Fine provides expert legal representation and guidance to clients in need of legal assistance. With a focus on professionalism, integrity, and client satisfaction, the Law Office of Gordon B. Fine is dedicated to serving the legal needs of individuals and businesses in the United States. Contact them today for experienced and reliable legal services.
Law Office of Dennis R. Vetrano, Jr., LLC
The Law Office of Dennis R. Vetrano, Jr., LLC is a reputable institution located at 100 South Bedford Road, Mount Kisco, New York, United States. Specializing in Divorce & Family Law, our attorneys are well-versed in all new laws and are dedicated to giving your legal matter the attention it deserves. Serving Dutchess, Orange, Putnam, Rockland, Ulster & Westchester Counties, our legal team focuses exclusively on divorce and family law litigation to provide tailored care and resources for each unique case. With a commitment to professional, dedicated representation, our Dutchess County family law attorneys aim to empower clients with information and support throughout the legal process. Offering discounts to teachers, military members, and law enforcement personnel, we strive to show appreciation for their hard work. Trust the Law Office of Dennis R. Vetrano, Jr., LLC to advocate for your rights and work towards a successful resolution for your family.
Zelenitz, Shapiro & D’Agostino, P.C.
Zelenitz, Shapiro & D’Agostino, P.C. is a renowned law firm located at 12032 Queens Boulevard, New York, New York, United States. Specializing in family law and divorce cases, their team of experienced attorneys is dedicated to helping clients navigate through the emotionally complex and draining process of ending a marriage. From handling custody issues to providing legal protection in cases of domestic violence, the firm offers expert guidance and support every step of the way. With a focus on affordable and highly experienced representation, Zelenitz, Shapiro & D’Agostino, P.C. is committed to helping families find resolution and begin the process of healing during challenging times.
Law Offices of David Bliven
The Law Offices of David Bliven, located at 19 Court Street in White Plains, New York, is a reputable institution specializing in divorce and family law. With a focus on safeguarding the interests of clients during challenging legal proceedings, Attorney David Bliven and his team offer personalized representation tailored to each case's unique needs. From child custody to domestic violence issues, the firm provides comprehensive services to clients facing family law matters. With over two decades of experience, Attorney Bliven combines his prosecutorial background with private practice expertise to deliver high-quality legal services at affordable prices. Additionally, the firm offers assistance to survivors of domestic abuse, juvenile offenders, and those falsely accused of family crimes. For a skilled divorce or family law attorney in the Bronx or White Plains, contact the Law Offices of David Bliven at (347) 797-1188 | (914) 362-3080 to schedule a consultation.
Law Office of Dana Stricker, PLLC
The Law Office of Dana Stricker, PLLC is a reputable legal institution located at 303 South Broadway in Tarrytown, New York. Specializing in various areas of law, including but not limited to family law, estate planning, and real estate law, our dedicated team of professionals is committed to providing top-notch legal services to our clients. With a focus on personalized attention and tailored solutions, we strive to achieve the best possible outcome for each case. Trust the Law Office of Dana Stricker, PLLC for all your legal needs in the Tarrytown area.
Lever & Ecker, PLLC Personal Injury & Accident Attorneys
Lever & Ecker, PLLC Personal Injury & Accident Attorneys is a reputable law firm located at 120 Bloomingdale Road in White Plains, New York. Specializing in personal injury and accident cases, their team of experienced attorneys is dedicated to providing top-notch legal representation for their clients. With a focus on achieving justice and fair compensation for those who have been wronged, Lever & Ecker, PLLC is committed to fighting for the rights of their clients. Whether you have been injured in a car accident, slip and fall incident, or any other type of personal injury situation, you can trust Lever & Ecker, PLLC to provide expert legal guidance and advocacy.
Christine J. Klein, P.C.
Christine J. Klein, P.C. is a reputable law firm located at 141 Tompkins Avenue in Pleasantville, New York. Specializing in various legal services, including but not limited to personal injury, family law, and estate planning, the firm is dedicated to providing top-notch representation for clients in need. With a focus on personalized attention and expert guidance, Christine J. Klein, P.C. is committed to achieving the best possible outcomes for their clients. Contact them today for a consultation.
- Visa support
- Visa center
- Immigration lawyer
- Notary
- Lawyer
- Law company
- Home insurance companies
- Expert solicitors
- client focused legal service in Albany
- client focused legal service in Amherst
- client focused legal service in Amityville
- client focused legal service in Amsterdam
- client focused legal service in Armonk
- client focused legal service in Babylon
- client focused legal service in Baldwin
- client focused legal service in Ballston Spa
- client focused legal service in Batavia
- client focused legal service in Bay Shore
- client focused legal service in Bellmore
- client focused legal service in Bethpage
- client focused legal service in Binghamton
- client focused legal service in Brentwood
- client focused legal service in Brewster
- client focused legal service in Briarcliff Manor
- client focused legal service in Brockport
- client focused legal service in Bronxville
- client focused legal service in Buffalo
- client focused legal service in Camillus
- client focused legal service in Carmel Hamlet
- client focused legal service in Carthage
- client focused legal service in Cedarhurst
- client focused legal service in Chappaqua
- client focused legal service in Cheektowaga
- client focused legal service in Chester
- client focused legal service in Clarence
- client focused legal service in Clinton
- client focused legal service in Cohoes
- client focused legal service in Cold Spring
- client focused legal service in Commack
- client focused legal service in Copiague
- client focused legal service in Cortlandt
- client focused legal service in Croton-on-Hudson
- client focused legal service in Deer Park
- client focused legal service in Delmar
- client focused legal service in Dunkirk
- client focused legal service in East Aurora
- client focused legal service in East Greenbush
- client focused legal service in East Meadow
- client focused legal service in East Rochester
- client focused legal service in East Syracuse
- client focused legal service in Ellenville
- client focused legal service in Elmont
- client focused legal service in Elmsford
- client focused legal service in Endicott
- client focused legal service in Fairport
- client focused legal service in Farmingdale
- client focused legal service in Fayetteville
- client focused legal service in Fishkill
- client focused legal service in Floral Park
- client focused legal service in Fredonia
- client focused legal service in Freeport
- client focused legal service in Fulton
- client focused legal service in Garden City
- client focused legal service in Geneseo
- client focused legal service in Glen Cove
- client focused legal service in Glens Falls
- client focused legal service in Goshen
- client focused legal service in Grand Island
- client focused legal service in Great Neck
- client focused legal service in Hamburg
- client focused legal service in Harrison
- client focused legal service in Hauppauge
- client focused legal service in Haverstraw
- client focused legal service in Hawthorne
- client focused legal service in Hempstead
- client focused legal service in Hicksville
- client focused legal service in Hilton
- client focused legal service in Hopewell Junction
- client focused legal service in Hudson
- client focused legal service in Hudson Falls
- client focused legal service in Huntington
- client focused legal service in Huntington Station
- client focused legal service in Jamestown
- client focused legal service in Jericho
- client focused legal service in Johnson City
- client focused legal service in Kenmore
- client focused legal service in Kingston
- client focused legal service in Lakewood
- client focused legal service in Lancaster
- client focused legal service in Latham
- client focused legal service in Levittown
- client focused legal service in Liberty
- client focused legal service in Lindenhurst
- client focused legal service in Lockport
- client focused legal service in Long Beach
- client focused legal service in Lynbrook
- client focused legal service in Mahopac
- client focused legal service in Manhasset
- client focused legal service in Massapequa
- client focused legal service in Massapequa Park
- client focused legal service in Massena
- client focused legal service in Medina
- client focused legal service in Melville
- client focused legal service in Merrick
- client focused legal service in Middletown
- client focused legal service in Mineola
- client focused legal service in Monsey
- client focused legal service in Montgomery
- client focused legal service in Monticello
- client focused legal service in Mount Kisco
- client focused legal service in Mount Vernon
- client focused legal service in Nanuet
- client focused legal service in New City
- client focused legal service in New Hyde Park
- client focused legal service in New Paltz
- client focused legal service in New Rochelle
- client focused legal service in New Windsor
- client focused legal service in Newburgh
- client focused legal service in Niagara Falls
- client focused legal service in North Syracuse
- client focused legal service in North Tonawanda
- client focused legal service in Northport
- client focused legal service in Nyack
- client focused legal service in Ogdensburg
- client focused legal service in Olean
- client focused legal service in Oneida
- client focused legal service in Orchard Park
- client focused legal service in Ossining
- client focused legal service in Oswego
- client focused legal service in Pearl River
- client focused legal service in Peekskill
- client focused legal service in Penfield
- client focused legal service in Pine Bush
- client focused legal service in Pittsford
- client focused legal service in Plattsburgh
- client focused legal service in Pleasantville
- client focused legal service in Pomona
- client focused legal service in Port Chester
- client focused legal service in Port Jefferson
- client focused legal service in Port Jefferson Station
- client focused legal service in Port Jervis
- client focused legal service in Port Washington
- client focused legal service in Poughkeepsie
- client focused legal service in Pulaski
- client focused legal service in Queensbury
- client focused legal service in Rensselaer
- client focused legal service in Rhinebeck
- client focused legal service in Rochester
- client focused legal service in Rockville Centre
- client focused legal service in Rome
- client focused legal service in Roslyn
- client focused legal service in Roslyn Heights
- client focused legal service in Rye
- client focused legal service in Rye Brook
- client focused legal service in Salamanca
- client focused legal service in Salina
- client focused legal service in Saratoga Springs
- client focused legal service in Scarsdale
- client focused legal service in Schenectady
- client focused legal service in Setauket- East Setauket
- client focused legal service in Smithtown
- client focused legal service in Springville
- client focused legal service in Stony Brook
- client focused legal service in Stony Point
- client focused legal service in Suffern
- client focused legal service in Syosset
- client focused legal service in Syracuse
- client focused legal service in Tarrytown
- client focused legal service in Ticonderoga
- client focused legal service in Tonawanda
- client focused legal service in Troy
- client focused legal service in Uniondale
- client focused legal service in Utica
- client focused legal service in Valhalla
- client focused legal service in Valley Stream
- client focused legal service in Vestal
- client focused legal service in Victor
- client focused legal service in Wantagh
- client focused legal service in Wappingers Falls
- client focused legal service in Warsaw
- client focused legal service in Warwick
- client focused legal service in Watertown
- client focused legal service in Webster
- client focused legal service in West Babylon
- client focused legal service in West Hempstead
- client focused legal service in West Nyack
- client focused legal service in West Seneca
- client focused legal service in Westbury
- client focused legal service in White Plains
- client focused legal service in Williamsville
- client focused legal service in Woodbury
- client focused legal service in Yonkers
- client focused legal service in Yorktown Heights
List of businesses, places and services in New York
⭐ business help 🔍 services ☎ phones 🕒 opening times ✍️reviews 🌍 addresses, locations 📷 photos