USMLE discussion is dense with abbreviations that everybody assumes you already understand. This is the short version.
The exams
USMLE: the United States Medical Licensing Examination. A sequence of exams rather than one test.
Step 1: the first, focused on foundational science applied to clinical scenarios. Reported as pass or fail since January 2022, with no numeric score.
Step 2 CK: Clinical Knowledge. More clinical, focused on diagnosis and management. Still reported as a three-digit score, which is why it now carries most of the screening weight.
Step 3: the final examination in the sequence, usually taken after medical school during residency, though some applicants take it earlier.
Organisations
NBME: the National Board of Medical Examiners. Involved in producing the examination, and the publisher of the self-assessment practice exams. When someone says “I took an NBME”, they mean one of those practice exams rather than the real thing.
ECFMG: the Educational Commission for Foreign Medical Graduates. The body through which international medical graduates are certified to enter US graduate medical education.
Preparation vocabulary
Question bank / Qbank: a collection of practice questions with explanations. The explanations are the substance; the questions are how you get to them.
Common examples include UWorld, AMBOSS and QBankly. They differ mainly in explanation depth and in whether a reference library is bundled alongside.
Dedicated: a period set aside for exam preparation with no competing obligations. Length varies widely and is a convention rather than a formal stage.
Tutor mode: answering questions with the explanation shown immediately. Better for learning. Contrasted with timed mode, which mimics exam conditions and is better for pacing and stamina.
Self-assessment: a practice exam designed to estimate performance, taken under conditions resembling the real exam.
Free 120: a publicly available set of practice questions released by the examination’s publishers, commonly used close to the exam date because it is considered representative of the real question style.
Application vocabulary
The Match: the annual process that places applicants into US residency positions, involving applications, interviews and a ranking algorithm.
IMG: international medical graduate. Someone who qualified at a medical school outside the United States and Canada.
Away rotation / elective: a clinical rotation completed at an institution other than your own, often used by applicants to gain US clinical experience and letters of recommendation.
Things people say that mean less than they sound like
“High yield”: appears frequently, means only that someone judged the topic likely to be examined. It is an opinion, not a category.
“Score correlation”: practice results are correlated with real outcomes but not deterministic. Treat any single number as an estimate with wide error bars.
Scoring vocabulary
Three-digit score: the numeric result still reported for Step 2 CK. Not a percentage and not a percentile; it is a scaled score, which is why a raw percentage from a practice block does not map onto it directly.
Passing standard: the threshold for a pass, set by the examination’s governing body and reviewed periodically. It has moved before and can move again, which is why advice quoting a specific figure should be checked against the current published standard.
Score report: the document issued after the exam. For a pass/fail exam it carries the outcome and some performance feedback; for a scored exam it carries the number.
Preparation resources people name constantly
Self-assessment forms: the practice exams published for students to estimate their performance. Referred to by form number, which is why you will see people comparing results on specific numbered forms.
Annotation: writing your own notes into a review book, usually errors from question practice. Distinct from highlighting, and considerably more useful.
Content review: learning or relearning the underlying material, as opposed to question practice. Both are necessary; the proportions shift toward questions as the exam approaches.
A word on advice you will read
Much of the vocabulary above appears in forum posts alongside specific numbers, timelines and strong claims about what works. Treat the vocabulary as reliable and the numbers as anecdote.
The people posting are a self-selected group, their circumstances differ from yours, and almost none of them are describing a controlled comparison. Use the terms to understand what is being discussed, not to calibrate your own plan.
Frequently asked questions
What is the difference between the NBME and the USMLE?
The USMLE is the examination sequence. The NBME is one of the organisations behind it, and it also publishes the self-assessment practice exams students commonly use, which is why its name is used loosely to mean those.
What does "dedicated" mean?
A block of time set aside for exam preparation without clinical or classroom obligations. Its length varies by school and by student; it is a convention rather than a formal stage.
What is the Match?
The process that places applicants into residency positions in the United States. Applications, interviews and a ranking process run on an annual cycle, and USMLE results feed into it.