Logitech Trackman Portable Mouse Trackball

This laptop clip-on trackball came out around year 1991.

The bar shaped thing is the left button, the dot shape is right button.

You clip this onto the side of your portable laptop.

Laptop exists in 1991. It isn't like today's. It was thick and heavy, with a tiny screen, about 640x480 pixels.

See also:

• Toshiba T4700CT laptop