CS50x 2026 - Lecture 0 - Scratch
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This is CS50, Harvard University's introduction to the intellectual enterprises of computer science and the art of programming.
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TABLE OF CONTENTS
00:00:00 - Introduction
00:02:03 - This is CS50
00:02:24 - Artificial Intelligence
00:14:12 - Computer Science
00:15:36 - Unary
00:16:06 - Binary
00:29:46 - ASCII
00:40:52 - Unicode
00:44:57 - Color
00:50:17 - Representation
00:55:23 - Algorithms
01:04:45 - Pseudocode
01:14:09 - Scratch
01:18:15 - Hello, World
01:21:21 - Hello, You
01:30:20 - Meow
01:33:51 - Abstractions
01:37:55 - Conditionals
01:40:05 - Oscartime
01:51:59 - Ivy’s Hard…
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Chapters (20)
Introduction
2:03
This is CS50
2:24
Artificial Intelligence
14:12
Computer Science
15:36
Unary
16:06
Binary
29:46
ASCII
40:52
Unicode
44:57
Color
50:17
Representation
55:23
Algorithms
1:04:45
Pseudocode
1:14:09
Scratch
1:18:15
Hello, World
1:21:21
Hello, You
1:30:20
Meow
1:33:51
Abstractions
1:37:55
Conditionals
1:40:05
Oscartime
1:51:59
Ivy’s Hardest Game
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