Released in late 1985 (and widely distributed in 1986), TP3 was distributed on a single 360KB 5.25-inch floppy disk. No installation was required. You inserted the disk, typed TURBO , and within a second, you were looking at the legendary blue IDE.
You can run Turbo Pascal 3.0 right now on modern hardware: turbo pascal 3
A single byte poke would change a character on the screen. No APIs. No Console.WriteLine . Just raw power. Released in late 1985 (and widely distributed in