If the keyboards have 4-pin Apple Desktop Bus (ADB) plugs, you could use them with any of the mentioned computers. The same is true for the mice.
A Mac-compatible serial modem may have a MiniDIN-8M plug (to be connected to a Modem port of one of the computers.) If it instead is a "PC-style" serial modem with a DB-25F port, you will need a Mac modem cable (DB-25M to MiniDIN-8M).
Mac-compatible printers should have a MiniDIN-8 port (and/or possibly Ethernet).
Power cords (earthed cable sets) are typically the same for these computers.
If you want detailed information, do post names and model/type numbers (not serial numbers) from labels on each device. Pictures would also help.