1. TimeLine Kirsten Smith Whitfield –Social Studies 2nd Period

2. 3500 BC • Sumerians recored pictographs representing words on clay tablets.

3. 45,000 BC • Neaderthnal man varves a picture on a woolly mammoth tooth

4. 450 • Chinese invent printing by inking carved wood blocks

5. 1450 • Johann Gutenberg invents a printing press using moveable metal type.

6. 1792 • Mechanical semaphore is invented in france

7. 1877 • Thomas Edison invents the phonograph a device to recored sound on a wax cylinder.

8. 1924 • Pictures are first transmitted over telephone lines

9. 1963 • First communications satellite is launched allowing world wide live broadcast of the 1964 olympics

10. 1972 • The first email messages are sent

11. 1975 • The personal computer, both small and wonderful is invented.

12. 1990 • Tim berners-lee invents the world wide web