➞Vacuum tubes and magnetic drums as memory.

➞𝘿𝙞𝙨𝙖𝙙𝙫𝙖𝙣𝙩𝙖𝙜𝙚𝙨: They were expensive, consumed a lot of electricity, generated heat, and were prone to failure.

➞𝙇𝙖𝙣𝙜𝙪𝙖𝙜𝙚𝙨: They worked with machine language and could only perform one task at a time.

➞𝙀𝙭𝙖𝙢𝙥𝙡𝙚𝙨:

- 𝘜𝘕𝘐𝘝𝘈𝘊: First commercial computer.

- 𝘌𝘕𝘐𝘈𝘊: Capable of performing thousands of operations per second.

- 𝘊𝘰𝘭𝘰𝘴𝘴𝘶𝘴: Created by Alan Turing, used to decipher German codes in World War II.

➞Vacuum tubes were replaced by transistors.

➞𝙄𝙢𝙥𝙧𝙤𝙫𝙚𝙢𝙚𝙣𝙩𝙨: Reduction in the size and power consumption of computers.

➞𝙇𝙖𝙣𝙜𝙪𝙖𝙜𝙚𝙨: High-level languages such as COBOL and FORTRAN were introduced.

➞𝙊𝙥𝙚𝙧𝙖𝙩𝙞𝙣𝙜 𝙨𝙮𝙨𝙩𝙚𝙢𝙨: Specific operating systems and application software began to be used.

➞𝙄𝙢𝙥𝙖𝙘𝙩: Greater development of commercial applications and efficiency in energy use.

➞Integrated circuits were introduced.

➞𝙄𝙢𝙥𝙧𝙤𝙫𝙚𝙢𝙚𝙣𝙩𝙨: Smaller, faster, more energy-efficient, and more affordable computers.

➞𝘼𝙙𝙫𝙖𝙣𝙩𝙖𝙜𝙚𝙨: Made programming and transporting machines easier.

➞𝙄𝙢𝙥𝙖𝙘𝙩: Computers became more accessible and powerful than previous generations.

➞Introduction of the microprocessor.

➞𝙄𝙢𝙥𝙧𝙤𝙫𝙚𝙢𝙚𝙣𝙩𝙨: Smaller, faster computers with greater processing speed.

➞𝙉𝙚𝙬 𝙩𝙚𝙘𝙝𝙣𝙤𝙡𝙤𝙜𝙞𝙚𝙨: Use of semiconductor memories and languages such as C.

➞𝙀𝙭𝙖𝙢𝙥𝙡𝙚𝙨: IBM 5100, Apple I and II, Altair 8800.

➞Focus on artificial intelligence (AI).

➞𝙉𝙚𝙩𝙬𝙤𝙧𝙠𝙨: Global interconnection thanks to the Internet.

➞𝘼𝙙𝙫𝙖𝙣𝙘𝙚𝙨: Parallel processing, quantum computing and nanotechnology.

➞𝗜𝗻𝘁𝗲𝗿𝗳𝗮𝗰𝗲𝘀: Voice and touch screens.

➞𝙀𝙭𝙖𝙢𝙥𝙡𝙚𝙨: IBM Watson, Siri, Alexa, quantum computers in development.