CAPTCHA and tank: what they have in common

1. Step 1. CAPTCHA — uses — Optical character recognition (OCR). Distorted text that is hard for OCR.
2. Step 2. Optical character recognition (OCR) — is a kind of — Algorithm. OCR is an algorithm that turns a picture of letters into text.
3. Step 3. Algorithm — is used in — Rubik’s Cube. Solved with algorithms.
4. Step 4. Rubik’s Cube — has part — Spring. Springs adjust the tension.
5. Step 5. Spring — is part of — Machine gun. A return spring.
6. Step 6. Machine gun — is part of — Tank. The Mark I’s machine guns.

Open Evothings