If you find a from the late 90s, it likely assumed you had DOS or Windows 95. Today, you run QBASIC via an emulator like DOSBox or using QB64 (a modern compiler that extends QBASIC).
QBasic (Quick Beginner's All-purpose Symbolic Instruction Code) is a high-level programming language developed by Microsoft in 1991 for MS-DOS. It is designed to be easy for beginners to learn, featuring a simple syntax that mirrors English. qbasic programming for dummies pdf
Note: When you open QBASIC, you will see a blue screen. Press Esc to clear the "Survival Guide" dialog box and get to the code editor. If you find a from the late 90s,