Online courses and saw: what they have in common

1. Step 1. Online courses — uses — World Wide Web. The web.
2. Step 2. World Wide Web — is used in — Blog. The web.
3. Step 3. Blog — evolved from — Newspaper. A personal publication.
4. Step 4. Newspaper — is made of — Wood pulp. Cheap newsprint.
5. Step 5. Wood pulp — is material for — Jigsaw puzzle. Cardboard.
6. Step 6. Jigsaw puzzle — uses — Saw. Cut out with a fretsaw.

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