Windows and incandescent light bulb: what they have in common

1. Step 1. Windows — uses — Graphical user interface. Windows.
2. Step 2. Graphical user interface — uses — Computer mouse. The pointer is controlled with a mouse.
3. Step 3. Computer mouse — has part — LED. An optical mouse.
4. Step 4. LED — is part of — Torch (flashlight). Modern torches use LEDs.
5. Step 5. Torch (flashlight) — has part — Incandescent light bulb. A bulb (today an LED).

Open Evothings