Expert-system tooling: ART (Automatic Reasoning Tool) was originally designed to run on which class of hardware/platform?

Introduction / Context:
ART (Automatic Reasoning Tool), developed during the heyday of expert systems, provided a high-performance rule-based environment. Early expert-system tools frequently targeted specialized hardware optimized for symbolic processing, such as LISP machines, before later ports broadened availability.

Given Data / Assumptions:

• The time period is the early-to-mid expert-systems era.
• Vendors prioritized platforms with strong Lisp support and memory management.
• We are selecting the original/primary intended hardware class.

Concept / Approach:
LISP machines (e.g., Symbolics, TI Explorer) were prime hosts for early AI toolkits due to native Lisp support and development environments. ART’s early deployments emphasized these machines. Although later versions and related tools reached conventional workstations and PCs, the historically accurate initial platform class is LISP machines.

Step-by-Step Solution:

Verification / Alternative check:
Contemporary product literature and retrospectives frequently list LISP machines among ART’s earliest supported platforms, with later ports extending reach.

Why Other Options Are Wrong:

• Personal computers / microcomputers: became targets later; not the original emphasis.
• All of the above: historically inaccurate for the initial design intent.
• None of the above: incorrect because LISP machines fit.

Common Pitfalls:
Projecting modern cross-platform expectations backward; assuming early expert systems launched on commodity PCs.

Final Answer:
LISP machines