Lisp machine
Lisp Machines were high-end workstations based on memory chips with tag bit support for various reasons, as well as a
RISC CPU specially microcoded to support infinite-precision arithmetic and other operations that made high-level dynamic languages such as
Lisp and
Prolog execute much faster and more safely than on ordinary machines. The primary purpose of this architecture was to allow the systems programmers to concentrate on developing high-level, well-integrated environments and tools, which succeeded in some sense. However, the economics of this architecture rapidly became untenable, and the companies that produced them went out of business.
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