Microprocessors and the Personal Computer Revolution
Fourth Generation: The Microprocessor
Distinguish a microprocessor from a whole computer and connect it to wider adoption.
In this lesson
Lesson goals
Distinguish a microprocessor from a whole computer and connect it to wider adoption.
The idea explained
A processor executes instructions but needs memory, input/output and supporting components to form a useful system. Intel’s 4004, introduced in November 1971, was a landmark programmable microprocessor. Reusing a processor with different software offered an alternative to dedicated logic for every task. This helped computation spread into smaller devices. Fourth-generation teaching connects this microprocessor direction with the 1970s onward, without implying older technologies vanished immediately.
Dates and milestones
- November 1971: Intel introduces the 4004.
- 1970s onward: expansion of microprocessor-based systems.
Why was this a turning point?
Processing became a reusable component for many products, expanding possible applications and designers.
Activity: try before reading the answer
With only a processor, name three things needed for a device that accepts two numbers and displays their sum.
Answer and explanation
Memory for code and data, input and output are needed, alongside power and interconnection. The processor is one subsystem.