Calculator Easter eggs & programs including Wolf3D, Doom, and Halo

Secret Defender: http://www.metacafe.com/watch/yt-2JgO2FZL748/play_defender_on_calculator/
Secret Pong: http://www.metacafe.com/watch/963065/play_pong_on_calculators/
Comedian with Secret Pong hack: http://www.metacafe.com/watch/1128290/play_pong_on_a_calculator_hack/
Secret Tetris: http://www.metacafe.com/watch/983069/play_tetris_on_calculators/
Good Heavens! Secret Halo!: https://www.youtube.com/watch?v=9Af4Y46dqwQ
Secret Color Video Game: https://www.youtube.com/watch?v=aXhJfpExLpk&NR=1
Hidden Calculator video: https://www.youtube.com/watch?v=AWpDNmPIp2g&feature=related
Calculator movie that reminds me of the animations in Guitar Hero: https://www.youtube.com/watch?v=muocupKxNgA&feature=related
Matrix animation on calculator (I think he has too much free time.): https://www.youtube.com/watch?v=6xVxG46_poE&NR=1
Another Matrix animation on a calculator: https://www.youtube.com/watch?v=DbbruGBfx-Q&feature=related
^_^ Talking anime character: https://www.youtube.com/watch?v=2qk9ZlT8C3g&feature=related
Turn off your calculator: https://www.youtube.com/watch?v=aCE0y9ADq6I&NR=1
Wolf 3D on a TI-82 calculator: https://www.youtube.com/watch?v=J74PzZykNA4
Doom on a TI-83 calculator: https://www.youtube.com/watch?v=TuupoxmeQ6U&feature=related
zDoom 0.12 (TI-83): https://www.youtube.com/watch?v=PCUK4_LMLEQ&feature=related
Wolf 3D on a TI-84+SE calculator: https://www.youtube.com/watch?v=5XDTh6T-T7o
Use your calculator as an MP3 player: https://www.youtube.com/watch?v=n2qid_hw_mw&feature=related
There are also others like Zelda or Mario on calculators.
While I’m mentioning calculators, there’s a trick where if you have a certain version of Microsoft Excel and put a code into a certain cell there will be a flight simulator.

0.07734 put into a calculator and turned upside down is HELLO.O .
55378008 put into a calculator and turned upside down is BOOBLESS.
On an episode of a Batman cartoon, The Riddler turns 31753701 upside down, except that it was on a chalkboard instead of a calculator. It reveals the address of 10 LESLIE, which was where he had his next brawl or theft.
Take any calculator, put in 71077345, and turn it upside down. What company is spelled out!?

If you find any more Wolf 3D, Doom, or Halo calculator applications, then please post the links here. If you find any more calculator Easter eggs, then please post them here.

^_^

EDITS on March 6, 2019: I crossed out the dead links.

Late Night With Jimmy Fallon had a calculator Easter egg at 6 or 7 minutes at http://www.hulu.com/watch/587021

EDIT: Jimmy Fallon said that calculator company Texas Instruments is laying off 1,100 workers because of the economy.  He said that this is the released statement from the workers:

Isaac Asimov predicted pocket calculators.

Jerry Merryman, the inventor of the handheld electronic calculator has died at 86: https://www.msn.com/en-us/news/us/jerry-merryman-inventor-of-the-handheld-electronic-calculator-dead-at-86/ar-BBUqqgG?OCID=ansmsnnews11