LISP 2 was a
programming language
A programming language is a system of notation for writing computer programs. Most programming languages are text-based formal languages, but they may also be graphical. They are a kind of computer language.
The description of a programming l ...
proposed in the 1960s as the successor to
Lisp
A lisp is a speech impairment in which a person misarticulates sibilants (, , , , , , , ). These misarticulations often result in unclear speech.
Types
* A frontal lisp occurs when the tongue is placed anterior to the target. Interdental lispi ...
. It had largely Lisp-like semantics and
Algol 60
ALGOL 60 (short for ''Algorithmic Language 1960'') is a member of the ALGOL family of computer programming languages. It followed on from ALGOL 58 which had introduced code blocks and the begin and end pairs for delimiting them, representing a k ...
-like syntax. Today it is mostly remembered for its syntax, but in fact it had many features beyond those of early Lisps.
Early Lisps had many limitations, including limited data types and slow numerics. Its use of fully parenthesized notation was also considered a problem. The inventor of Lisp,
John McCarthy, expected these issues to be addressed in a later version, called notionally Lisp 2. Hence the name Lisp 1.5 for the successor to the earliest Lisp.
[McCarthy, 1979]
Lisp 2 was a joint project of the
System Development Corporation and
Information International, Inc., and was intended for the
IBM built
AN/FSQ-32 military computer. Development later shifted to the
IBM 360/67 and the
Digital Equipment Corporation
Digital Equipment Corporation (DEC ), using the trademark Digital, was a major American company in the computer industry from the 1960s to the 1990s. The company was co-founded by Ken Olsen and Harlan Anderson in 1957. Olsen was president unti ...
PDP-6
The PDP-6, short for Programmed Data Processor model 6, is a computer developed by Digital Equipment Corporation (DEC) during 1963 and first delivered in the summer of 1964.
It was an expansion of DEC's existing 18-bit systems to use a 36-bit ...
. The project was eventually abandoned.
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See also
*
Lisp-1 vs. Lisp-2
Common Lisp (CL) is a dialect of the Lisp programming language, published in ANSI standard document ''ANSI INCITS 226-1994 (S20018)'' (formerly ''X3.226-1994 (R1999)''). The Common Lisp HyperSpec, a hyperlinked HTML version, has been derived fro ...
Bibliography
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References
External links
LISP 2 section of History of LISP at Software Preservation Group*
Paul McJones. The LISP 2 Project. IEEE Annals of the History of Computing, October-December 2017, pages 85-92.
Lisp programming language family
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