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A Conceptual History Of Computing
Transcript of A Conceptual History Of Computing
Thinking Like A Programmer
The Unit Of Information: Binary Digits (a.k.a. bits)
Modern Digital Computers
Analog to Digital - Everything is Numbers
Early Devices For Computing
Alan Turing's Enigma
"Every effectively calculable function is a computable function."
In other words, if it can be calculated, it can be done by a computer.
Binary: 0 or 1 [base 2]
Decimal: 0, 1, 2, 3... 9 [base 10]
Hexadecimal: 0, 1, 2... 9, A, B, C, D, E, F [base 16]
Two Hex digits can be a byte
ANYTHING Can Be Represented As A Number
A byte is 8 bits - a Kilobyte is 1024 bytes (2^10)
MegaBytes MB (1024 x 1024)
Hertz - "cycles per second" GigaHertz (GHz)
The "working area" that's "near" the processor
where data moves back and forth quickly
(also measured in Bytes)
You Don't Have To Be Harry Potter To
Be A Programmer
graphical user interface