On the map view

Build Track Mouse or number pad with Num Lock down
Move Cursor Hold [control] and use Arrow Keys
Call Broker 'M'
Save Game [control] + 'S'
Load Game [control] + 'L'
Build Station 'F8' (on existing track)
Build Train 'F7' (after building a station)
Terrain Info 'I'
Build industry 'B'

On the train orders screen

Goto Station 'G'
Change station 'S'
Automatic schdedule 'A'
Remove station 'Delete'
Toggle wait until full 'W'
Remove last wagon 'Back space'
Add station 'N'
Set priority orders 'O'

On the select station screen

Change selection Mouse over or number pad
Accept selection Click mouse or 'Enter'