what are they?

My Win98 machine has the following in the Network neighnourhood:

Client for Microsoft Networks
3Com Etherlink III ISA (3c509b-TPO) in PnP Mode
Dialup Adapter
TCP/IP ->3Com Etherlink III ISA (3c509b-TPO) in PnP mode
TCP/IP -> dial-up Adapter

Ok I have connection to internet via dialup and connect to a other machine that is used as storage.

What are they and which may I remove?

 

Client for Microsoft Networks = networking client, basically used to identify which network Windows should connect to.

3Com Etherlink III ISA (3c509b-TPO) in PnP Mode = network card used to connect to the other system

Dialup Adapter = network adapter (modem) used to connect to the internet

TCP/IP ->3Com Etherlink III ISA (3c509b-TPO) in PnP mode = protocol (language) used by the network card to communicate with the other computer

TCP/IP -> dial-up Adapter = protocol (language) used by the modem to communicate with the Internet

If you want to keep the same functionality as you already have, don't remove anything.