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MCS-51 - Wikipedia
Explore Intel’s history- The 8051 Microcontroller
Introduction to 8051 Microcontroller - GeeksforGeeks
8051 Microcontroller Introduction and Basics - Electronics Hub
8051 Datasheet(PDF) - Intel Corporation
A History of Early Microcontrollers, Part 8: The Intel 8051
8051 Microcontroller - Tutorial and Guide - CircuitsToday
Embedded Systems/8051 Microcontroller - Wikibooks
8051 Architecture - In-depth explanation using old and modern …