The development of computers has progressed significantly over the decades, with various milestones marking the introduction of key concepts, technologies, and advancements. Here's a brief overview of computer-related introductions by millennium: ### 20th Century (1900s - 1999) - **1940s - 1950s: Early Computers** - **1943-1944**: Colossus, the first programmable digital computer, was developed for code-breaking during World War II.
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