The Calculator-Based Laboratory (CBL) is a data collection device manufactured by Texas Instruments

Texas Instruments

Texas Instruments Inc. , widely known as TI, is an American company based in Dallas, Texas, United States, which develops and commercializes semiconductor and computer technology...

and introduced in 1994. The CBL can be used to collect data either in conjunction with a TI graphing calculator, or on its own. Different from programming languages, it consists of a set of commands starting with a colon(:) which are to be executed in existing applications such as the default calculator and the graphical calculation program.

A CBL script example

:smplprgm
:Prgm
:Request "Give a value.",userin
:expr(userin)^2*π!result
:Disp result
:EndPrgm