WORKS!try it ↓
Use the mouse, or your finger on a touch screen.
Use the mouse, or your finger on a touch screen.
The ideas are older than the machine: the mouse was shown to the public in 1968, and research labs spent the 1970s building screens of overlapping windows. By the mid-1980s you could buy one, with a manual that explained how to “click” and “drag”.
The screen has no grey. Every dot is black or white, so grey is a checkerboard of the two, and every icon was drawn by hand, dot by dot, on a 32 by 32 grid.
Moving a whole window was too much work for the processor, so while you dragged only a dotted outline followed the pointer and the window jumped when you let go. Menus stayed open only while you held the button down.
Desk accessories, like the calculator and the note pad, were tiny programs that could open on top of whatever else was running, at a time when the computer ran one real program at once.