1st Gen

First Generation First generation back First generation Computers didn't look Like this First generation is around 1940s So big that An entire room With rows of cabinets Fans and wires 1st generation Also the computer's Processor is not A CPU like They still ran On vacuum tubes Which are glass Tubes that processed Electric signal (the 1 and 0 in binary) Perform calculations And you actually Needed thousands of These vacuum tubes Just for one computer ENIAC computer (it has 19,000 of those tubes) So not only In size Used tons of Electricity and generated A lot of heat And the maintenance Was bothersome as well Because if just One tube stopped working You'd have to Thousands of others And there was No hard drive either The data storage Magnetic drum Drum which worked Like a hard drive Tiny capacity and A size as Big as a bucket 1st generation No screens Operating systems images Or videos whatsoever 1st generation Punch card So users had Punch cards to Operate the computer Which is basically Stiff paper cards With holes in them Each hole represented Information or a command And the computer Line by line 1st generation computers usage And since everything Was so basic Were mainly used Only for calculations Scientific research or Government documents With the results Either printed directly Or punched back Into cards for Storage and later processing AMD 2nd Gen Second generation in 2nd generation The second generation Vacuum tubes were Replaced by transistors Which have the Same function as Size of transistors (in cm) But transistors were Smaller than vacuum tubes Which made computers IBM 1401 computer Smaller and cheaper As well Gen 1 hours vs Gen 2 minutes Also transistors were Faster than vacuum tubes So if you need 1 hour For calculation and stuff Generation computers You only need Minutes with the Second generation computers Operate longer Since it doesn't Gen 1 hours Gen 2 minutes Generate as much Vacuum tubes Generate as much heat However despite the Upgrade Was operated was Still handled with Like in the Magnetic drum But at least The storage was Upgraded from magnetic Drum to magnetic tape Magnetic tape Around 2.3 MB per reel Hold more data Magnetic drum 2nd generation 3rd Gen Third generation this 3rd generation Computers finally started To look like Computers of our era Gen 3 (1960s) That's because instead Of wiring thousands Of separate transistors Second generation computers This time they IC (integrated circuits) Used ICs or Integrated circuits instead So these integrated Circuits contain a chip And these chips (Silicon) Die Chip Plastic case Pins Actually contain many Transistors in a Microscopic size Or even just Nanometer size This was created Directly on them Called photolithography Photolithography process Drawing patterns with The circuit 3rd generation Monitor Keyboard But the most That computers began Supporting keyboards with monitors So people don't Punch cards anymore To operate them 3rd generation UNIX IBM OS/360 Also operating systems Like Unix and IBM 360 Up as well 1969 - UNIX Text-based Interface gotta type to run command However the interface At that time Was still text based GUI (Graphical User Interface) click icons to operate programs Instead of graphical Have today And lastly floppy 3rd generation Floppy disk They became The preferable storage For computers Portable and convenient Compared to magnetic tapes