HTBasic

HTBasic is a computer language, a dialect of BASIC, developed by TransEra Corp. to replace HP Basic. It was the first HP Basic compatible language that could operate within an MS-DOS operating system.

The language is optimised for engineers and scientists. It includes complex number support, matrix manipulation functions, and commands for controlling GPIB (IEEE-488 or HPIB) bus laboratory instruments.

TransEra s proprietary HTBasic Interpreter (computing) implementation is the only one. It comes with an IDE, however, it has some limitations. For example, it forces you to add new subroutines at the end of the code, prunes identifiers longer than 12 characters, and rejects arrays with more than 65000 elements. Unlike most modern BASIC variants, it bases on consequent use of line numbers, even though the IDE helps you greatly with them.