This document specifies the terms and definitions, composition and classification, basic parameters, models, working environment, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of computerized seamless knitted underwear machines. This document is applicable to computerized seamless knitting underwear machines that can knit single-sided knitted fabrics made of spandex covered yarn, nylon, bare spandex, cotton yarn, elastic yarn, etc., without or with ties.