“Bluebook” refers to several widely used references depending on the context. The most common meanings are The Bluebook legal citation guide, Kelley Blue Book for vehicle pricing, the College Board’s Bluebook testing app, the Social Security Administration’s Blue Book for disability claims, and the classic blue exam booklets used in college courses. Here’s what each one is and how it works.
The Bluebook: A Legal Citation Guide
The Bluebook, formally titled “The Bluebook: A Uniform System of Citation,” is the standard reference for citing legal sources in the United States. Now in its 22nd edition, it provides a systematic method for law students, lawyers, judges, scholars, and other legal professionals to reference the cases, statutes, regulations, and secondary sources they rely on in their work.
If you’ve ever read a court opinion or law review article and noticed footnotes packed with abbreviations, volume numbers, and page references, those citations almost certainly follow Bluebook formatting rules. The guide covers how to cite everything from Supreme Court decisions to international treaties to blog posts. Law students typically learn Bluebook citation in their first year of law school, and most law reviews require strict compliance with its rules when publishing articles.
Kelley Blue Book: Vehicle Pricing
Kelley Blue Book (often called KBB) is a vehicle valuation service that helps buyers and sellers understand what a car is worth. It’s one of the most recognized names in car pricing, and dealerships, lenders, and individual buyers all use it as a reference point when negotiating. KBB publishes several distinct values for each vehicle, and understanding the differences matters when you’re buying or selling.
Trade-In Value is KBB’s estimate of what a dealer will offer you for your current car. This is typically the lowest number because the dealer needs to cover inspection, reconditioning, and resale costs before making a profit.
Private Party Value is the starting point for a sale between two individuals rather than through a dealer. This figure is higher than trade-in value because there’s no middleman, but it’s an “as is” price with no warranty included. The final amount depends on the car’s actual condition and your local market.
Fair Purchase Price applies to both new and used cars bought from a dealer. Updated weekly, it represents KBB’s estimate of what you can reasonably expect to pay in your area for a specific vehicle with specific options and mileage. It sits near the midpoint of what KBB calls the Fair Market Range. This figure excludes taxes, title, and fees, and for new cars it also excludes any special manufacturer offers.
When shopping for a car, pulling up the KBB value gives you a baseline so you know whether a listed price is reasonable. When selling or trading in, it helps you set realistic expectations before walking into a dealership.
College Board’s Bluebook Testing App
Bluebook is also the name of the College Board’s digital testing application, used to deliver the SAT, PSAT-related assessments, and AP Exams. If your student is preparing for the SAT (either weekend or school day), PSAT/NMSQT, PSAT 10, PSAT 8/9, or an AP Exam, they’ll need this app installed on their device before test day.
The app runs on Windows computers, Macs, iPads, and school-managed Chromebooks. The device needs Wi-Fi capability and must be fully charged on test day, since it needs to stay powered on for three to four hours. The College Board recommends bringing a power cord or portable charger as backup. Students taking an AP Exam or SAT with Essay on an iPad will also need an external keyboard.
Beyond test day, Bluebook lets students practice with sample questions inside the app itself, which helps them get comfortable with the digital format before the real exam.
The SSA Blue Book for Disability Claims
The Social Security Administration publishes its own “Blue Book,” formally called “Disability Evaluation Under Social Security.” This is the medical reference guide the SSA uses to determine whether someone qualifies for disability benefits. It contains detailed listings of impairments organized by body system, covering conditions from musculoskeletal disorders to mental health conditions to cancer.
Each listing spells out specific medical criteria. If your condition meets or equals the criteria in one of these listings, the SSA considers you disabled for purposes of Social Security Disability Insurance (SSDI) or Supplemental Security Income (SSI). The adult listings apply to anyone 18 and older, though some criteria also apply to children when the disease affects them similarly. If you’re filing a disability claim, understanding which listing applies to your condition can help you gather the right medical documentation.
Blue Book Exam Booklets
In college and university settings, a “blue book” often refers to the thin, stapled booklets with blue covers and lined pages that students use for handwritten essay exams. They’ve been a fixture of higher education for generations, sold at campus bookstores for a small cost.
Blue books remain popular for a straightforward reason: they create a level playing field. Every student gets the same standardized format and amount of space, making it easier for instructors to evaluate responses consistently. They’re also immune to the technical problems that can plague digital exams. There’s no crashing, freezing, or accidental deletion. More recently, many instructors have returned to blue book exams specifically because handwritten responses ensure the work is genuinely the student’s own, without assistance from AI tools, autofill, or predictive text.