The station building was completed in 1884 ...
Stands A trams approaching via Damrak
Stands D mainly city buses.
Stands F mainly city buses
And finally we have the new bus station (IJzijde) on the waterfront site of the station.
Stands G mainly out-of-town buses. (click on the diagram to enlarge)
AMSTERDAM" in orange/red signed out along the bus station roof ...
And, beyond the buses, the boats. Two adjoining ferry "stations" are just outside the covered area.
Stick the whole lot together and together you have got a whole lot of public tarnsport; all in one place, easy to find and, according to the Wantage branch of the fbb family, easy to use. (click on the diagram for an enlargement)
P.S. Stay in the Ibis hotel, ask for a room overlooking the station and you can enjoy trains all day and all night.