2

2 (from 2 to 2)
20 (from 20 to 20th Party Congress)
21 (from 21 to 21st century BC)
22 (from 22 to 22nd century BC)
23 (from 23 to 23rd century BC)
24 (from 24 to 24th Field Artillery Regiment (PS))
25 (from 25 to 25th century BC)
26 (from 26 to 26th century BC)
27 (from 27 to 27th century BC)
28 (from 28 to 28th century BC)
29 (from 29 to 29th Division)
2_ (from 2-10-0 to 2ème arrondissement, Paris)
2c (from 2C-B to 2cm Gebirgsflak 38)
2d (from 2D computer graphics to 2DTV)
2g (from 2G to 2G)
2m (from 2MASS to 2MASS)
2n (from 2nd Armored Division to 2nd Polish Corps)
2s (from 2Step to 2Step)
2v (from 2VSB to 2VSB)