Abbreviations – California Railroad Museums
... I'll provide some translations.
CSRM – California State Railroad Museum – in Sacramento [ ... home of the R&LHS archival collection]
GGRM – Golden Gate Railroad Museum – until recently located at Hunters Point, a former Naval Shipyard in San Francisco. Most of the collection moved to the Niles Canyon Railway (see below) for storage. Other pieces sold or traded.
NCRy – Niles Canyon Railway – operated by the Pacific Locomotive Association (PLA) – Niles Canyon (in the Bay Area east of Oakland) is on the route of the original transcontinental railroad line connecting San Francisco (via a ferry ride to Oakland) with Sacramento and on east to Promontory – site of the golden spike ceremony of Central Pacific and Union Pacific in May 1869.
RRS – Feather River Rail Society, operators of the Western Pacific Museum in Portola. Provided motive power and (UP) crews for the move of equipment from Golden Gate Railroad Museum to Niles Canyon Railway. Some GGRM equipment also moved to Portola. ... —Kyle Wyatt
[from the R&LHS Newsgroup.]