Its an acronym, but its also made up so the other post was correct. And its especially correct since it was a response to another post saying just pronounce a made up word how you want. SRAM is quite frequently pronounced 'SHRAM' because, well I really dont know. There is no 'H' in the acronym and its an acronym so its not like there is a rule in the english language where a 'SH' sound should be made.