These entries are only used once: structured query language, relational database management system, extensible markup language. These entries are used multiple times: hypertext markup language (HTML), HTML, cascad-ing style sheets (CSS), CSS, CSS, relational data stream management system (RDSMS),RDSMS.
Acronyms
CSS cascading style sheets. 1
HTML hypertext markup language. 1
RDSMS relational data stream management system. 1