Those are IBM Wireless LAN Entry cards, as this is pre-wifi.

FORUM warning:
picture WAY too big, even for this sub-forum! Please read the Forum Rules, especially Section 5: viewtopic.php?f=16&t=14339
Especially for Imgur pictures there is a simple way to downsize those huge pictures.
Adding a small letter l between the picture name q0Te71N and .jpg reduces the picture to acceptable size.
See for yourself when you click on the links below!
Before: https://i.imgur.com/q0Te71N.jpg = HUGE (click on the + symbol/cursor when on Imgur to see "the real deal")
After. : https://i.imgur.com/q0Te71Nl.jpg = acceptable
The humongous Before picture was displayed on the Forum, which is NOT acceptable.