TechWhirl (TECHWR-L) is a resource for technical writing and technical communications professionals of all experience levels and in all industries to share their experiences and acquire information.
For two decades, technical communicators have turned to TechWhirl to ask and answer questions about the always-changing world of technical communications, such as tools, skills, career paths, methodologies, and emerging industries. The TechWhirl Archives and magazine, created for, by and about technical writers, offer a wealth of knowledge to everyone with an interest in any aspect of technical communications.
>The distinction usually is that an acronym forms a word people can pronouce
>(like DASD), whereas an initialism forms a word that people cannot
>pronounce (like IBM). Both acronyms and initialisms usually appear in
>uppercase--that is until the language incorporates them as standard words
>such as radar, laser, and snafu. --Marlana
The OED seems to capitalize if the letters are pronounced: IBM, EEC, ..
and treat them as nouns if they are pronounced as words: Nato, Unesco,...