Can I run programs from past issues of S&T, written in BASIC, on my Windows XP computer?

Sample screen from software called Sec.

All the BASIC programs that have appeared in S&T since 1984 are collected on our Web site at All you need to run them is a BASIC interpreter or compiler. Interpreters let you edit and execute the BASIC listings; compilers can also turn them into standalone applications.

Back in the 20th century, Microsoft Windows included a BASIC interpreter. You can still obtain the program, called QBasic, by downloading a file called OLDDOS from Microsoft ( Unpack its contents into an empty folder, and you’ll have QBasic and its help file. (You’re supposed to have a valid licensed copy of MS-DOS or Windows 95/98 to have the right to install QBasic, per Microsoft’s Use of Software statement.)

You don’t have to use QBasic, however. Other interpreters and compilers exist — some for free — for various operating systems. To explore the options, see and

— Stuart J. Goldman


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