Green’s Dictionary of Slang

1. the Royal Military Academy, Woolwich.

1890		Daily Chronicle 4 Apr. 7/2: The shop is the name given in the Royal Artillery and the Royal Engineers to the Establishment which turns out the bulk of the officers of those two distinguished corps [F&H].
1899		Kipling ‘The Flag of Their Country’ in Complete Stalky & Co. (1987) 209: They’re goin’ up for Sandhurst or the Shop in less than a year.
1916		‘Sapper’ ‘The Motor-Gun’ in Men, Women & Guns 36: [He]recognised him as one of his own term at the ‘Shop’.
1925		(con. WWI) Fraser & Gibbons Soldier and Sailor Words 256: Shop, The: The Royal Military Academy, Woolwich.

2. (Aus.) Melbourne University.

1900

Bulletin (Sydney) 14 Jul. 12/4: The refined delicate-looking Prof. Gregory, Melbourne’s new geology man, goes ’Ome in a few weeks to prepare for the Royal Geographical Society’s jaunt to the Antarctic. [...] The Times [...] says he is ‘a man of imagination and enthusiasm and scientific insight, who is sure to make the most of his exceptional opportunity.’ Which view his work, since he has been in Melbourne confirms. He is probably the best scientific lecturer the ‘shop’ has ever had, and finds not only ‘sermons in stones,’ but positive romances.