ATEC

ATEC may refer to:


 * Atec, an aerospace and energy component manufacturer
 * ATEC v.o.s., a Czech aircraft manufacturer
 * Autism Treatment Evaluation Checklist, a psychological assessment tool
 * United States Army Test and Evaluation Command
 * Inland Railway aka Australian Transport and Energy Corridor
 * ATEC Technologies, a startup technology company that specializes in Formal Verification.