| Y 4.Ok 4 | Select Committee to Investigate Indian Contracts in Oklahoma |
| Y 4.Ol 1 | Select Committee to Investigate Old Age Pension Plans (House) |
| Y 4.Ol 1/2 | Special Committee to Investigate the Old-Age Pension System (Senate) |
| Y 4.Or 2/1 | Select Committee on Heavy and Projectiles Ordnance (Senate) |
| Y 4.Or 2/2 | Select Committee on Ordnance and Warships (Senate) |
| Y 4.Or 2/3 | Joint Select Committee on Ordnance |
| Y 4.Or 2/4 | Select Committee on the Investigation of Ordnance and Ammunition (House) |
| Y 4.Ou 8 | Select Committee on Investigation of the Alleged Outrages in the Southern States (Senate) |
| Y 4.Ou 8/2 | Ad Hoc Select Committee on Outer Continental Shelf (House) |
