NPL

NPL can stand for:the IATA airport code for New Plymouth Airport, on the west coast of New Zealand's North Island;the National Pop League, a club in Glasgow, Scotland;the Naperville Public Library;the National Priorities List;the National Physical Laboratory, India;the National Physical Laboratory, UK;the National Puzzlers' League;the Nauru Pacific Line, located in Nauru;the Netscape Public License;the Non-Partisan Leaguea Non Performing Loan (Financial Theory)the Namibia Premier League (in Namibian soccer);the Nigerian Premier League in Nigerian soccerthe Northern Premier League (in English soccer);the Norwegian Premier League (in Norwegian soccer);any of at least five unrelated programming languages:the NPL functional programming language by Rod Burstall and John Darlington in 1977the New Programming language - the original name of the PL/I by IBM in 1964the Nonprocedural language by T.D. Truitt et al in 1980the (N)iakwa (P)rogramming (L)anguage by Niakwa Inc. in 1984, former BASIC2CThe NORD Programming Language - an internal systems language used at Norsk Dataa nuclear pumped laseran abbreviation for non-patent literature used before the United States Patent and Trademark Office (USPTO).
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1. New Programming Language. IBM's original (temporary) name for PL/I, changed due to conflict with England's "National Physical Laboratory." MPL and MPPL were considered before settling on PL/I. Sammet 1969, p.542.
2. A functional language with pattern matching designed by Rod Burstall and John Darlington in 1977. The language allowed certain sets and logic constructs to appear on the right hand side of definitions, E.g.
setofeven(X) :x: x in X & even(x) :>
The NPL interpreter evaluates the list of generators from left to right so conditions can mention any bound variables that occur to their left. These were known as set comprehensions. NPL eventually evolved into Hope but lost set comprehensions which were called list comprehensions in later functional languages.
[John Darlington, "Program Transformation and Synthesis: Present Capabilities", Research Report No. 77/43, Dept. of Computing and Control, Imperial College of Science and Technology, London September 1977.]
3. NonProcedural Language. A relational database language developed by T.D. Truitt et al in 1980 for Apple II and MS-DOS.
["An Introduction to Nonprocedural Languages Using NPL", T.D. Truitt et al, McGraw-Hill 1983].

Non Patent Literature -- documents and publications that are not patents or published patent applications but are cited as references for being relevant in a patent prosecution. For example, a magazine article or doctoral thesis relevant to a claimed invention might be cited as non-patent literature. Typically, references cited in an application are grouped into: domestic patents and patent application publications; foreign patents; and non-patent literature.

Context: Patent 

EPA's list of the most serious uncontrolled or abandoned hazardous waste sites identified for possible long-term remedial action under Superfund. The list is based primarily on the score a site receives from the Hazard Ranking System. EPA is required to update the NPL at least once a year. A site must be on the NPL to receive money from the Trust Fund for remedial action.

Airport Name: New Plymouth Airport
Airport Location: New Plymouth, New Zealand
IATA Code: NPL
ICAO Code: NZNP