BASIC is the "Beginner's All-purpose Symbolic Instruction Code" programming language.
Since it was very simple for users to understand, many micro computers from the 1970's and 1980's would include BASIC as a feature.
One of the more popular versions was the Microsoft ROM version, which was used in many machines.
Microsoft went on to improve BASIC with Quick Basic which removed line numbers, and made BASIC more procedural, then the next evolution was Visual Basic a pseudo Object Oriented version for programming the Microsoft Windows environments. And finally the Visual Basic .net language which is for the .net framework.
Early versions of Basic were known for needing line numbers, and it allowed direct hardware access via PEEK,POKE keywords. Many of these programs were NOT portable, as the hardware was not standardized, and many vendors added their own extensions to the language.
10 PRINT "HELLO WORLD."
A sample basic program.
With Quick Basic, programs no longer needed line numbers, and the language was able to use the medium & large memory models with later versions. Quick Basic was also included in MS-DOS 5.0 replacing the older GWBasic.
PRINT "HELLO WORLD."
A sample QuickBasic program.
Just a quick grouping of popular basics