TI Explorer

The Texas Instruments Explorer is a family of Lisp machine computers. These computers were sold by Texas Instruments in the 1980s. The Explorer is based on a design from Lisp Machines Incorporated, which is based on the MIT Lisp Machine. The Explorer was used for development and deployment of artificial-intelligence software
Notable is also the early use of the NuBus as the system bus for the Explorer computer family.
History.
The Explorer was used for development and deployment of artificial-intelligence software. Later models were based on a special 32-bit microprocessor developed by Texas Instruments, which supported the execution of Lisp software in hardware.
Operating system.
The operating system of the Explorer was written in Lisp Machine Lisp and also supported Common Lisp.
Usage.
A notable application is SPIKE, the scheduling system for the Hubble Space Telescope. SPIKE was developed on Texas Instruments Explorer workstations.