Case

It can be big or small

People

CASE, a database system used by the British Citizens Advice organization until replaced by Petra from 2011
Best, worst and average case, types of case analysis in computer science
Computer-aided software engineering, the use of computers to assist in the software development life cycle
Computer-assisted structure elucidation, the use of computers to elucidate molecular structures
Switch statement, a control statement in computer programming
Use case, in software engineering and systems engineering; a description of a system's behaviour as it responds to requests

Case-hardening, a process of hardening the surface of a metal object
Case-shot, a type of anti-personnel canister ammunition similar to a shrapnel shell
A trouble ticket, also known as a support case, in an issue tracking system
Proof by exhaustion, a method of mathematical proof also known as "proof by cases"
Contribution to ARIEL Spectroscopy of Exoplanets (CASE), an instrument on the European space telescope ARIEL

Case Middle School, part of Punahou School in Oahu, Hawaii
Case Western Reserve University, an independent research university in Cleveland, Ohio, US
Center for Advanced Studies in Engineering, now Sir Syed CASE Institute of Technology, a private engineering institute in Islamabad, Pakistan
Center for Architecture, Science and Ecology, a research facility of the Rensselaer Polytechnic Institute, US
Centre for Christian Apologetics, Scholarship and Education, a ministry of New College, University of New South Wales
Council for Advancement and Support of Education, a nonprofit association of educational institutions, US
Case study, a research method involving an up-close, in-depth, and detailed examination of a particular case, in the social and life sciences

Case Corporation, defunct manufacturer of agricultural equipment, tractors and cars
- Case Construction Equipment (Case CE), a manufacturer of construction equipment
- Case IH, a manufacturer of agricultural equipment
W. R. Case & Sons Cutlery Co., an American manufacturer of knives

Conceptually Accurate Signed English, a form of Manually Coded English
Grammatical case, a type of linguistic inflection
Letter case, in typography, the distinction between majuscule (capital or uppercase) and minuscule (lowercase) letters

Case River, a tributary of the Kabika River in Ontario, Canada
Case (policy debate), in debate competition
Business case, capturing the reasoning for initiating a project
Egyptian Exchange, a stock exchange comprising the Cairo and Alexandria stock exchanges
Legal case, a dispute between opposing parties, being resolved by a court proceeding