Windows and bellows: what they have in common

1. Step 1. Windows — uses — Graphical user interface. Windows.
2. Step 2. Graphical user interface — evolved from — Command line. The graphical interface replaced the text one.
3. Step 3. Command line — evolved from — Typewriter. The teletype was a printing terminal.
4. Step 4. Typewriter — has part — Keyboard. The keys drive levers with type.
5. Step 5. Keyboard — is part of — Pipe organ. Manuals were the first keyboards.
6. Step 6. Pipe organ — has part — Bellows. Bellows supply the air.

Open Evothings