Uploaded June 2025 | Updated September 2026, 1 week ago

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All computers throughout history have always functioned because of one simple device: a switch.

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SOURCES

computerhistory.org/timeline/1940
en.wikipedia.org/wiki/Transistor_count
techtarget.com/whatis/definition/logic-gate-AND-OR-XOR-NOT-NAND-NOR-and-XNOR
101computing.net/binary-additions-using-logic-gates
101computing.net/binary-subtraction-using-logic-gates
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LINKS TO COMMENTS

youtube.com/watch?v=7DtrY54F3AY&lc=Ugxv4pXLmrLXSrJ0iBh4AaABAg
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IMAGE/VIDEO CREDITS

ENIAC:
commons.wikimedia.org/wiki/File:Glen_Beck_and_Betty_Snyder_program_the_ENIAC_in_building_328_at_the_Ballistic_Research_Laboratory.jpg

Vacuum Tubes:
commons.wikimedia.org/wiki/File:Early_triode_vacuum_tube_collection.jpg

Transistors:
commons.wikimedia.org/wiki/File:BC546B_transistor_(01).jpg
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TIME CODES

00:00 Intro
00:41 Switches
01:21 Binary Numbers
02:17 Binary Addition
02:53 Vacuum Tubes
03:59 Truth Table: Addition
05:13 Carry-Over Check
05:49 Sum Check
06:33 Logic Gates
07:27 Binary Subtraction
08:30 Binary Multiplication
09:01 Transistors
09:13 Closing Thoughts
09:58 Featured Comment