2. 2400 BC  The first calculator invented.  Called an: abacus

3. 776 BC  The use of pigeons that can send a message is recorded.

4. 1567  First pencil invented by Conrad Gesner

5. 1765  Erasers are put on pencils by the Eberhard Company

6. 1803  Steel ink pen is said to have been developed in Birmingham, England.

7. 1822  First mechanical computer invented by Charles Babbage.

8. 1825  The element: aluminum :is discovered by Hans Christian Oerosted.

9. 1834  Braille is invented by Louis Braille.

10. 1835  The Morse Code is invented by Samuel F.B. Morse.

11. 1837  First practical telegraph invented by Samuel F.B. Morse.

12. 1859  Lead acid rechargeable battery invented by Gaston Plante.

13. 1876  Telephone invented and demonstrated by Alexander Graham Bell.

14. 188O  Ball point pen patented by Alonzo T. Cross

15. 1883  Long distance telephone service started between Chicago and New York.

16. 1893  Wireless communication invented by Nikola Tesla.

17. 1903  Powered airplane invented by Wilbur and Orville Wright.

18. 1907  Color photography invented August and Louis Lumiere.

19. 1919  James Smathers develops the first electric typewriter.

20. 1923  Television invented by Philo Farnsworth.

21. 1959  IBM(International Business Machines) create desk-sized computers for businesses and scientists.