The document lists various technologies and the years they were invented, including the horn-book in 1650, magic lantern in 1870, chalkboard in 1890, pencil in 1900, stereoscope in 1905, film projector in 1925, overhead projector in 1930, ballpoint pen in 1940, mimeograph in 1940, headphones in 1950, slide rule in 1950, television in 1958, hand-held calculator in 1970, personal computer in 1980, interactive whiteboard in 1999, YouTube in 2004, and iPad in 2010.

1. Peter Awad – DEC. 2015

2. Peter Awad – DEC. 2015
Horn-Book
1650

3. Peter Awad – DEC. 2015
1870
Magic Lantern

4. Peter Awad – DEC. 2015
1890
Chalkboard

5. Peter Awad – DEC. 2015
1900
Pencil

6. Peter Awad – DEC. 2015
1905
Stereoscope

7. Peter Awad – DEC. 2015
1925
Film Projector

8. Peter Awad – DEC. 2015
1930
Overhead Projector

9. Peter Awad – DEC. 2015
1940
Ballpoint Pen

10. Peter Awad – DEC. 2015
1940
Mimeograph

11. Peter Awad – DEC. 2015
1950
Headphones

12. Peter Awad – DEC. 2015
1950
Slide Rule

13. Peter Awad – DEC. 2015
1958
Television

14. Peter Awad – DEC. 2015
1970
Hand-held Calculator

15. Peter Awad – DEC. 2015
1980
Personal Computer

16. Peter Awad – DEC. 2015
1983

17. Peter Awad – DEC. 2015
1999
Interactive Whiteboard

18. Peter Awad – DEC. 2015
2004
YouTube

19. Peter Awad – DEC. 2015
2010
iPad

20. Peter Awad – DEC. 2015

21. Peter Awad – DEC. 2015
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