Accident law firm in Los Angeles, CA
165 results found
Search for local businesses, places and services near you
- 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
- Italy
- Poland
- France
- Germany
-
Lluis Law
● ClosedLluis Law is a well-established law firm located at 205 South Broadway in Los Angeles, California. Specializing in Criminal Defense, Immigration, and Worker’s Compensation, our team of Latino attorneys who are fluent in English and Spanish have been serving the community for over 40 years. Our experienced immigration attorneys have represented clients locally and globally, providing services such as removal defense, family visas, and naturalization. We also have a strong track record in defending clients in complex criminally related immigration cases.
205 S Broadway, Los Angeles, CA 90012, United States -
The Agopoglu Law Corp., PLC
● ClosedThe Agopoglu Law Corp., PLC is a premier law firm located at 1901 Avenue of the Stars in Los Angeles, California, United States. Our dedicated team of lawyers is committed to providing stability, protection, and peace of mind to our clients. We offer a wide range of legal services including representation in accidents, personal injury cases, civil litigation, criminal defense, family law, and immigration matters. With a focus on ensuring our clients' prosperity, we strive to provide the most valuable legal services possible. Our experienced attorneys handle cases involving car accidents, personal injury claims, civil disputes, criminal charges, family law matters such as divorce, child custody, and support, as well as immigration issues including visas, citizenship, and deportation defense.
1901 Avenue of the Stars Suite 1900, Los Angeles, CA 90067, United States -
The Shahbaz Firm
● OpenThe Shahbaz Firm, located at 163 South Avenue 24, Los Angeles, California, is a dedicated institution providing individualized care for all your legal needs. Founded by attorney Danish Shahbaz in 2018, the firm prioritizes professionalism, integrity, and respect for clients facing immigration challenges or recovering from personal injuries. Danish Shahbaz, your personal injury lawyer in Los Angeles, is committed to providing unparalleled dedication and support to each client. With a deep understanding of immigration and personal injury law, the firm offers a range of legal services to address specific needs, from U visas to auto accidents. Whether you need assistance with an immigration case or a personal injury claim, Shahbaz Firm is here to guide you through the legal process with compassion and expertise. Contact us today for trusted legal support and representation.
163 S Ave 24 #202, Los Angeles, CA 90031, United States -
Boardwalk Law Firm
● ClosedBoardwalk Law Firm is a reputable institution located at 888 Prospect Street in San Diego, California. Our team of experienced lawyers is dedicated to helping individuals with a wide range of questions regarding their accidents and personal injury claims. We are committed to providing the answers and solutions you need to navigate the legal system with ease. With locations in Orange County, Los Angeles, Riverside, Sacramento, San Bernardino, San Diego, San Francisco, Chicago, Dallas, Las Vegas, Phoenix, Atlanta, Seattle, and Washington, D.C., we are here to assist you every day of the week. Whether you need legal advice or representation, our team is ready to help.
888 Prospect St Suite 200, La Jolla, CA 92037, United States -
My Rights Law - Criminal, DUI, and Injury Lawyers
● OpenMy Rights Law - Criminal, DUI, and Injury Lawyers is a legal institution located at 10601 Civic Center Drive in Rancho Cucamonga, California, United States. Specializing in California Criminal Defense, DUI, and Personal Injury cases, the dedicated team at My Rights Law is committed to providing top-notch legal representation to clients in San Bernardino County, Los Angeles County, Riverside County, Orange County, and throughout the state. Led by founding attorney Bobby Shamuilian, the team at My Rights Law is experienced, reliable, and aggressive in defending clients facing criminal charges, DUI offenses, and personal injury claims. The firm focuses on criminal defense and accident injury cases, offering reasonable rates for quality legal services.
10601 Civic Center Dr #200, Rancho Cucamonga, CA 91730, United States -
A1 Accident Lawyer
● OpenA1 Accident Lawyer, located at 335 North Brookhurst Street in Anaheim, California, was founded by Attorney Stephen Mashney. Mr. Mashney transitioned from a career as a pharmacist to become a successful lawyer, passing the California Bar examination on his first attempt. Established in 1994, A1 Accident Lawyer is committed to providing the best legal representation to California residents. The firm has grown to include five attorneys handling a variety of cases in Orange County and Los Angeles County. Specializing in areas such as auto accidents, personal injury, workers’ compensation, family law, bankruptcy, criminal law, and estate planning, A1 Accident Lawyer offers transparent and honest legal advice. With no hidden fees, the firm ensures clarity and straightforward communication with clients. The experienced attorneys at A1 Accident Lawyer strive to provide exceptional representation, guiding clients through the legal process with integrity and dedication.
335 N Brookhurst St, Anaheim, CA 92801, United States -
Yaghmai Law Firm, APC
● OpenYaghmai Law Firm, APC is a cutting-edge boutique firm located at 15303 Ventura Boulevard, Los Angeles, California, United States. Our team of experienced attorneys is dedicated to delivering seamless, results-driven solutions tailored to your unique legal needs. We combine advanced technology and automation with clear communication and unwavering diligence to revolutionize your client journey. Whether you need assistance with personal injury cases such as car accidents, wrongful death, or brain injuries, or immigration services including EB1 visas and green cards, our team is here to guide you to success. Contact us today to discover the full potential of our innovative legal services.
15303 Ventura Blvd #900, Sherman Oaks, CA 91403, United States -
Ilona Gorin Law Offices
● ClosedIlona Gorin Law Offices is a boutique law firm located on Ventura Boulevard in Los Angeles, California. Specializing in Personal Injury, Patient Advocacy, and Corporate Law, our experienced team of legal professionals has been serving individuals and businesses in the greater Los Angeles and San Fernando Valley areas for over 15 years. Whether you are dealing with an insurance claim, health coverage dispute, or business transaction, we provide thorough and aggressive representation to ensure the best possible outcome for our clients. Attorney Ilona Gorin, with over 20 years of experience, founded the firm in 2004 to utilize her knowledge of insurance companies' practices to benefit her clients. From accidents to business transactions, our team is dedicated to helping clients navigate the legal process and achieve the compensation and results they deserve. Contact us today for a consultation in English, Spanish, Russian, or Armenian.
16255 Ventura Blvd Suite 1255, Encino, CA 91436, United States -
Law Brothers
● OpenLaw Brothers is a prestigious law firm located at 8370 Wilshire Boulevard in Beverly Hills, California. Our team of experienced lawyers is dedicated to providing top-notch legal services to individuals and businesses in need of expert representation. With a focus on professionalism, integrity, and a commitment to achieving the best possible outcomes for our clients, Law Brothers is a trusted name in the legal community. Whether you are facing a complex legal issue or simply need guidance on a legal matter, our team is here to help. Contact us today to schedule a consultation and see how we can assist you with your legal needs.
8370 Wilshire Blvd Unit 205, Beverly Hills, CA 90211, United States -
Newmen Law
● ClosedNewmen Law is Southern California's premier law firm located at 2107 North Broadway, Santa Ana, California, United States. We offer innovative and personalized legal solutions to meet a wide range of legal needs. Our experienced team has a proven track record of successfully representing injury accident victims in Los Angeles and Orange County, ensuring they receive the compensation they deserve. Whether you are facing criminal charges or need assistance with immigration matters, our dedicated attorneys provide strategic and fierce representation. We are committed to understanding the details of your case and how it impacts you personally, striving to achieve the best possible outcomes for our clients.
2107 N Broadway STE 104, Santa Ana, CA 92706, United States -
Costen Ruiz Law
● OpenCosten Ruiz Law is a premier law firm located at 3435 Wilshire Boulevard in Los Angeles, California. Our team of experienced criminal defense attorneys serves clients in Los Angeles, Orange, Riverside, San Bernardino, and Ventura counties. If you are facing unjust charges or need assistance navigating the legal system, our proactive approach ensures that we work tirelessly to maximize the results of your case. Whether you are being investigated by the police for DUI, leaving the scene of an accident, or other charges, we are here to help.
3435 Wilshire Blvd UNIT 1101, Los Angeles, CA 90010, United States -
Nadrich & Cohen Accident Injury Lawyers
● OpenNadrich & Cohen Accident Injury Lawyers, located at 12100 Wilshire Boulevard in Los Angeles, California, is a premier law firm specializing in personal injury cases. With over three decades of experience, our talented team of attorneys is dedicated to fighting for the rights of families who have been impacted by auto accidents or other personal injuries. We take an aggressive approach to each case, treating our clients as if they were our own loved ones. Our firm has the skills and resources necessary to help you recover from your injuries and secure the compensation you deserve. We handle a wide range of personal injury cases in Los Angeles, including car accidents, slip and falls, and more. Our attorneys have a proven track record of success, having recovered over $350 million on behalf of clients since 1990.
12100 Wilshire Blvd #1250, Los Angeles, CA 90025, United States -
Law Office of Aaron Kohanim - Habitability Lawyer
● OpenThe Law Office of Aaron Kohanim, located at 1875 Century Park East in Los Angeles, California, is a boutique law firm specializing in commercial and residential unlawful detainer/evictions, real estate transactions, auto accidents, car accidents, and civil litigation matters. With a focus on providing tailored services to clients, the attorneys at the Law Office of Aaron Kohanim are dedicated to protecting the interests of a diverse range of clients. Whether you are a landlord in need of eviction services or a tenant facing eviction defense, our experienced team is here to help. We also handle habitability claims, landlord-tenant disputes, and real estate purchase and sale transactions. At the Law Office of Aaron Kohanim, our goal is to provide exceptional service and help our clients achieve their desired outcomes. With a client-focused approach, we handle all legal details so that you can focus on more important matters. Our team is detail-oriented, professional, and efficient, ensuring that your best interests are always kept in mind. Whether you are a seasoned investor or new to commercial real estate law, we are here to guide you through the process and protect your rights every step of the way.
1875 Century Park E, Los Angeles, CA 90067, United States -
Devermont & Devermont Disability Lawyers | Motorcycle Accident Attorneys
● OpenDevermont & Devermont Disability Lawyers | Motorcycle Accident Attorneys is a premier institution located at 12121 Wilshire Boulevard in Los Angeles, California, United States. Specializing in Social Security Disability cases, our compassionate and dedicated team of attorneys fights vigorously for your rights to secure the benefits you deserve. We are experienced in overturning denied disability benefits and handling the complexities of motorcycle accidents and the long-term disabilities they can cause. Our firm is a tight-knit family of attorneys who treat your fight for justice as our own, providing not just legal representation but personal support as well. Whether you are facing a denial of disability benefits or seeking retroactive benefits, we are here to help guide you through the process with expertise and care. With three generations worth of knowledge, we streamline the Social Security Disability and SSI appeals process to put you in the best position for a favorable outcome. Stay informed about the latest Social Security rulings and changes that may impact your claim with our comprehensive guides and articles. Contact us today for assistance with navigating the complexities of disability law and securing the benefits you are entitled to.
12121 Wilshire Blvd #1260, Los Angeles, CA 90025, United States -
Saeedian Law Group
● OpenSaeedian Law Group, located at 9025 Wilshire Boulevard in Beverly Hills, California, is a reputable law firm specializing in personal injury cases, particularly those involving broken bone injuries. If you or a loved one has suffered a broken bone due to negligence, such as car accidents or slip and falls, our experienced Los Angeles bone injury attorneys are here to help. We understand the physical and emotional toll that broken bones can have on a person, which is why we are committed to providing compassionate and skilled legal representation. Whether your injury requires minor treatment or extensive surgery and therapy, we have the knowledge and resources to pursue the compensation you deserve.
9025 Wilshire Blvd Penthouse, Beverly Hills, CA 90211, United States -
Stewart J Guss, Injury Accident Lawyers - Los Angeles
● OpenStewart J Guss, Injury Accident Lawyers in Los Angeles is a renowned law firm specializing in personal injury cases. Located at 3600 Wilshire Boulevard in Los Angeles, California, their team of experienced lawyers is dedicated to helping clients who have been injured in accidents seek justice and fair compensation. With a track record of successful cases and a commitment to providing personalized legal representation, Stewart J Guss, Injury Accident Lawyers is a trusted choice for those in need of legal assistance after an injury.
3600 Wilshire Blvd Ste. 1136, Los Angeles, CA 90010, United States -
Farahi Law Firm, APC
● OpenFarahi Law Firm, APC is a renowned legal institution located at 5340 Alla Road, Los Angeles, California, United States. Specializing in personal injury claims, their team of experienced lawyers is dedicated to helping clients win the maximum compensation they deserve. Whether you have been injured in a car accident, slip and fall incident, or any other type of accident, Farahi Law Firm is here to guide you through the legal process. Recognized as the 2023 Law Firm of the Year by the American Institute of Legal Professionals, Farahi Law Firm has a proven track record of success in recovering millions of dollars in settlements for their clients. Their team of attorneys, doctors, and case managers are well-equipped to handle all aspects of your personal injury claim, from connecting you with the best medical professionals to negotiating with insurance providers on your behalf.
5340 Alla Rd Suite 140, Los Angeles, CA 90066, United States -
Farzam Law Firm - Personal Injury Lawyers
● OpenFarzam Law Firm is a team of dedicated personal injury lawyers located at 11766 Wilshire Boulevard in Los Angeles, California. With a focus on providing exceptional legal representation for individuals who have been injured due to the negligence of others, our firm is committed to fighting for the rights of our clients and securing the compensation they deserve. Our experienced attorneys have a proven track record of success in handling a wide range of personal injury cases, including car accidents, slip and falls, and medical malpractice. If you have been injured and need legal assistance, contact Farzam Law Firm for a free consultation today.
11766 Wilshire Blvd #280, Los Angeles, CA 90025, United States -
ALPC Law Firm - Accident, Injury, and Employment Lawyers
● OpenALPC Law Firm is a highly reputable institution specializing in accident, injury, and employment law. Located at 879 West 190th Street in Gardena, California, our team of experienced lawyers is dedicated to providing top-notch legal services to clients in need. Whether you have been injured in an accident, are facing workplace disputes, or have suffered from employment discrimination, our skilled attorneys are here to fight for your rights and help you seek justice. Trust ALPC Law Firm to provide expert legal representation and guidance in your time of need.
879 W 190th St Suite 400, Gardena, CA 90248, United States -
The Dominguez Firm - Personal Injury Lawyers
● OpenThe Dominguez Firm - Personal Injury Lawyers is located at 879 West 190th Street in Gardena, California. With over 60,000 residents in Gardena and its proximity to busy freeways, the risk of accidents, especially involving trucks, is high. In 2017 alone, 510 people were injured or killed in traffic accidents in Gardena, making it a city with high accident rates. The firm specializes in representing clients involved in truck accidents, providing experienced legal guidance to ensure maximum compensation. The attorneys at The Dominguez Firm have over 30 years of experience and have recovered over $700 million for their clients. They offer free consultations and work on a contingency fee basis, meaning no upfront fees or hidden costs. In addition to truck accidents, the firm handles a wide range of personal injury cases, including motor vehicle accidents, slip and fall accidents, work accidents, and more. The firm's commitment to exceptional customer service and successful results sets them apart from other personal injury law firms in Gardena. With a team of legal professionals and investigators, The Dominguez Firm is dedicated to providing top-notch legal representation for accident victims in the greater Los Angeles area.
879 W 190th St Suite 71, Gardena, CA 90248, United States -
J&Y Law Injury and Accident Attorneys
● OpenJ&Y Law Injury and Accident Attorneys is a premier plaintiff’s personal injury law firm located at 1880 Century Park East in Los Angeles, California. Specializing in representing clients who have been involved in personal injury accidents or assaults, our experienced attorneys have a strong track record of obtaining justice for our clients. We offer skilled and aggressive representation, and you don't have to pay anything unless we win your case. Our team at J&Y Law is dedicated to providing the best possible outcome for injured individuals through advocacy, experience, and service. With a focus on client service, we strive to lead our clients to justice by showing constant compassion, earning their trust, and delivering resolute toughness in court.
1880 Century Park E Suite 717, Los Angeles, CA 90067, United States -
Law Offices of Jennie Levin, P.C.
● ClosedThe Law Offices of Jennie Levin, P.C. is a reputable institution located at 640 South San Vicente Boulevard, Los Angeles, California. Attorney Jennie Levin is a highly experienced personal injury lawyer who graduated from U.C. Berkeley, Boalt Hall School of Law and worked for a top law firm, Kaye Scholer, representing big pharmaceutical companies and large corporations. Ms. Levin is fluent in English, Spanish, Portuguese, Russian, and Hebrew, providing exceptional legal advocacy and professional service to her clients. With a track record of success in handling complex litigation cases and recovering millions of dollars for clients, the Law Offices of Jennie Levin is well-equipped to handle any personal injury or wrongful death case. Ms. Levin's experience in representing international multi-million dollar companies gives her the insider knowledge to effectively pursue justice and achieve results for her clients.
640 S San Vicente Blvd Suite 390, Los Angeles, CA 90048, United States -
The Accident Guys
● OpenThe Accident Guys is a law firm located at 6330 San Vicente Boulevard in Los Angeles, California. Specializing in car accidents and workers' compensation cases, they are dedicated to helping victims receive the compensation they deserve. With a team of experienced attorneys, The Accident Guys have a proven track record of success, as evidenced by their high success rate and numerous 5-star reviews. Whether you have been injured in a car accident or at work, their legal team is available 24/7 to provide free, no-obligation legal help. Los Angeles is known for its high number of traffic accidents, making it crucial to have a skilled attorney on your side. From negotiating with insurance companies to handling workers' compensation claims, The Accident Guys are here to ensure you get the money and medical treatment you need. Don't hesitate to reach out to them for assistance with your case.
6330 San Vicente Blvd #400, Los Angeles, CA 90048, United States -
Lagstein Law Firm PC Injury and Accident Attorneys
● OpenLagstein Law Firm PC Injury and Accident Attorneys is a renowned legal institution located at 1801 Century Park East in Los Angeles, California, United States. Specializing in personal injury and accident cases, their team of experienced lawyers are dedicated to providing exceptional legal representation to their clients. With a strong track record of success and a commitment to achieving justice for those who have been wronged, Lagstein Law Firm PC is a trusted name in the legal community. Whether you have been injured in a car accident, slip and fall, or any other type of incident, their attorneys are ready to fight for your rights and help you secure the compensation you deserve.
1801 Century Park E, Los Angeles, CA 90067, United States -
Alpha Accident Lawyers
● OpenAlpha Accident Lawyers is a leading law firm located in the heart of Los Angeles, California. Our team of experienced and dedicated lawyers specialize in handling all types of accident cases, including car accidents, slip and falls, and more. We are committed to fighting for our clients' rights and helping them obtain the compensation they deserve. With a proven track record of success, Alpha Accident Lawyers is the go-to firm for anyone in need of legal representation after an accident. Contact us today at 355 South Grand Avenue to schedule a consultation.
355 S Grand Ave Suite 2455, Los Angeles, CA 90071, United States -
i Accident Lawyer
● Openi Accident Lawyer, located at 155 West Washington Boulevard in Los Angeles, California, is a premier Car Accident and Injury Law Firm. Led by California car accident attorney Donald Stevenson, the firm is dedicated to helping individuals who have been involved in accidents caused by the negligence of others. Their team of experienced car accident lawyers can review the details of your case and help you get the compensation you deserve. It is important to seek medical treatment immediately after an accident, as delaying treatment can jeopardize your health and personal injury claim. The firm advises clients to document their injuries carefully and gather evidence such as pictures and witness information to strengthen their case. With a focus on maximizing car accident settlements, i Accident Lawyer is committed to providing top-notch legal representation in Los Angeles County Superior Courts.
155 W Washington Blvd Ste Mezz #102, Los Angeles, CA 90015, United States -
Gaylord & Nantais Attorneys at Law Santa Paula
● ClosedGaylord & Nantais Attorneys at Law Santa Paula is a renowned law firm located at 201 South 10th Street, Santa Paula, California, United States. With additional offices in Long Beach and Los Angeles, our team of experienced Workers’ Compensation Attorneys are dedicated to helping clients maximize the benefits associated with workers’ compensation claims. Our skilled lawyers have over 40 years of experience in representing clients in various work-related injuries, including hearing loss, orthopedic injuries, lung disease, and more. We are committed to providing quality representation to every client, and our team is capable of offering services in multiple languages, including Spanish. Whether you have suffered a construction accident, occupational disease, or any other work-related injury, our top-rated Workers’ Comp Attorneys are here to assist you. Contact Gaylord & Nantais Attorneys at Law Santa Paula for a consultation and let us fight for your rights and ensure that responsible parties are held accountable.
201 S 10th St, Santa Paula, CA 93060, United States -
Greene Broillet & Wheeler Firm, LLP
● ClosedGreene Broillet & Wheeler, LLP is a prestigious personal injury law firm located in El Segundo, California. Our dedicated team of attorneys is committed to helping victims of serious accidents recover physically and financially from the harm they have suffered due to the negligence, recklessness, or intentional conduct of others. Since 1970, our Los Angeles personal injury attorneys have been trusted to handle complex legal cases for catastrophic injury victims across the country. We have a proven track record of securing billions of dollars in compensation for our clients through both trial and settlement.
222 N Pacific Coast Hwy Suite 2100, El Segundo, CA 90245, United States -
Eisenberg Law Group PC - Los Angeles, Personal injury lawyer
● OpenEisenberg Law Group PC in Los Angeles is a reputable personal injury law firm located at 811 Wilshire Boulevard. With a team of experienced and dedicated lawyers, they specialize in representing clients who have been injured due to the negligence of others. Whether you've been in a car accident, suffered a slip and fall, or experienced medical malpractice, the attorneys at Eisenberg Law Group PC are committed to fighting for your rights and helping you receive the compensation you deserve. Contact them today for a free consultation to discuss your case.
811 Wilshire Blvd #1720, Los Angeles, CA 90017, United States -
Scott J. Corwin, A Professional Law Corporation
● OpenScott J. Corwin, A Professional Law Corporation is a highly experienced personal injury law firm located at 860 Via De La Paz in Los Angeles, California. Specializing in advocating for clients in all types of car crashes, including catastrophic and fatal injuries, the firm serves clients in various counties throughout California. Led by attorney Scott J. Corwin, who has over 30 years of experience and has recovered more than $175 million for his clients, the firm is known for securing large settlements and jury verdicts. With a focus on motor vehicle accident cases and claims involving dog bites and attacks, Scott J. Corwin is dedicated to providing personalized attention and compassionate support to each client. The firm aims to secure favorable outcomes quickly, with over 95 percent of cases settling within 5 to 9 months. Clients praise the firm for its efficient and effective handling of cases, with many expressing gratitude for the support received during challenging times. If you have been injured in a car accident due to someone else's negligence, Scott J. Corwin, A Professional Law Corporation is the team you can trust to fight for the justice you deserve.
860 Vía De La Paz Suite E-Loft B, Pacific Palisades, CA 90272, United States
- accident law firm in Anaheim
- accident law firm in Artesia
- accident law firm in Bell Gardens
- accident law firm in Beverly Hills
- accident law firm in Calabasas
- accident law firm in Costa Mesa
- accident law firm in Culver City
- accident law firm in Downey
- accident law firm in East Los Angeles
- accident law firm in El Segundo
- accident law firm in Garden Grove
- accident law firm in Gardena
- accident law firm in Hawthorne
- accident law firm in Huntington Beach
- accident law firm in Irvine
- accident law firm in Laguna Niguel
- accident law firm in Long Beach
- accident law firm in Newport Beach
- accident law firm in Norwalk
- accident law firm in Orange
- accident law firm in Oxnard
- accident law firm in Perris
- accident law firm in Rancho Cucamonga
- accident law firm in Riverside
- accident law firm in Sacramento
- accident law firm in San Bernardino
- accident law firm in San Diego
- accident law firm in San Francisco
- accident law firm in San Jose
- accident law firm in Santa Ana
- accident law firm in Santa Paula
- accident law firm in Simi Valley
- accident law firm in Thousand Oaks
- accident law firm in Torrance
- accident law firm in West Covina
- accident law firm in Westlake Village
List of local businesses, places and services in California
⭐ business help 🔍 services ☎ phones 🕒 opening times ✍️reviews 🌍 addresses, locations 📷 photos