AI industry history: which company or companies grew directly out of research at the MIT Artificial Intelligence Laboratory (commercializing Lisp machine technology)?

Introduction / Context:
The commercialization of AI in the late 1970s and early 1980s saw the emergence of companies founded by researchers from leading labs. At MIT’s AI Lab, work on Lisp machines led to spin-offs that attempted to bring specialized AI workstations to market.

Given Data / Assumptions:

• The focus is on MIT AI Lab spin-offs related to Lisp machine hardware/software.
• We are distinguishing real companies from distractor names.
• Multiple companies may fit.

Concept / Approach:
Two prominent firms—Lisp Machines Inc. (LMI) and Symbolics—were founded by MIT AI Lab alumni to develop and sell Lisp machine systems and environments. They competed in the niche of AI workstations, offering tightly integrated hardware and software optimized for symbolic computation. Other options listed are either generic or unrelated names.

Step-by-Step Solution:

Verification / Alternative check:
Historical accounts of the “Lisp machine wars” document LMI and Symbolics as competing MIT spin-offs.

Why Other Options Are Wrong:

Common Pitfalls:
Confusing later AI hardware vendors or workstation makers with the specific MIT-derived Lisp machine firms.

Final Answer:
both (b) and (c)