Peterson’s, founded in 1966, is an American company offering a wide range of live, print, and online products and services including test preparation, school searches, financial aid searches, career exploration tools, and professional writing services. Peterson’s is headquartered in Lawrence Township, Mercer County, New Jersey, with its mailing address in Lawrenceville, New Jersey.
Peterson's was privately held until its 1995 purchase by The Thomson Corporation. It became part of Thomson Learning (spun off in 2007 as Cengage Learning) On July 27, 2006, Peterson's was acquired by the Nelnet family of companies. 
Test Prep Offerings 
Peterson’s test preparation products include live and online courses, live and online practice tests, as well as printed study guides. They cover a wide range of topics including: SAT, ACT, PSAT, AP Exams, College Level Examination Program (CLEP), Test of English as a Foreign Language (TOEFL), Armed Services Vocational Aptitude Battery (ASVAB), civil service, nursing, EMT, postal service, case worker, law enforcement, and more. They also offer several free practice tests on their website.
Peterson's online courses for the SAT, ACT, and PSAT feature a Pre-Test that determines each user's strengths and weaknesses. Based on Pre-Test results, the lessons in the course are personalized to focus on the material that requires the most improvement. To help students with the additional essay included on both the SAT and ACT, Peterson's acquired CyberEdit in October 2002. The acquisition included College Application Help from EssayEdge.com and Resume Writing. These offerings have been integrated with Peterson's test preparation courses.
Civil Service and Military 
Civil Service test prep study books include, publications for Case Worker Exam, Civil Service Exams, Firefighter Exam, Emergency Dispatcher/911 Operator Exam, EMT Basic Certification, Law Enforcement Exams, and the U S. Postal Service Test 470. These Peterson's book publications contain several practice tests and course outlines.
Peterson's has negotiated contracts with the U.S. Military to offer individualized portals for enlisted Army, Navy, and Air Force personnel. Online test prep is available for the ASVAB, as well as publications for the American Foreign Service Officer Exam.