I think what you are looking for is IEEE Std 315-1975 (Reaffirmed 1993) Titled - Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters). You can buy a copy through Amazon.com or IEEE ( http://standards.ieee.org/ ). The IEEE online store has an option to download the document as a PDF. At 11:55 AM 10/1/03, you wrote: >Hi all, > >I am looking for a listing of commonly used prefixes or abbreviations >for electronic, electrical components for schematics: Q - transistor, K >- relay, C - capacitor. > >I believe I've had my hands on an official listing (ANSI?, IEEE?) but >can't seem to locate one now. > >If you have a pointer to where I might be able to get a copy I would >appreciate it much. > >Regards, >Bill > snip ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu