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/nil/ 1. New Implementation of Lisp. A language intended to be the successor of MacLisp. A large Lisp, implemented mostly in VAX assembly language. A forerunner of Common LISP.

["NIL: A Perspective", Jon L. White, MACSYMA Users' Conf Proc, 1979].

2. Network Implementation Language. Strom & Yemini, TJWRC, IBM. Implementation of complex networking protocols in a modular fashion.

["NIL: An Integrated Language and System for Distributed Programming", R. Strom et al, SIGPLAN Notices 18(6):73-82 (June 1983)].

3. Empty list or False. In Lisp, the empty list (or "nil list") is used to represent the Boolean value False. This is possible because Lisp is not typed. True is represented by the special atom "t".

4. Spoken in reply to a question, particularly one asked using the "-P" convention it means "No". Most hackers assume this derives simply from LISP, but NIL meaning "no" was well-established among radio hams decades before LISP existed. The historical connection between early hackerdom and the ham radio world was strong enough that this may have been an influence.
References in periodicals archive ?
Grand Race Universal 28/09/15 Not Sched 340 Vehicles Nil
The maximum relief is an amount equal to the full nil rate band at the rate in force at the time of the second death - in other words, if you had been bereaved twice you cannot claim the full unused nil rate band's in respect of all of your previous spouses.
Up first was Transfer Team FC who eased to victory, but could only manage a 4-2 scoreline, a result which meant they need Nil Nil Satis to drop points.
C'etait lorsque le president de la Republique s'adressait les leaders du Parti du Congres national dans l'Etat du Nil Bleu.
This had the effect of increasing the level of the surviving spouse's assets and their estate was liable for tax at 40% if above the nil rate band (currently pounds 300,000).
Alliance & Leicester Diamond Mastercard or Visa pounds nil 13.
EV Group has the largest installation base worldwide for single-step imprinting equipment and this new NIL stepper enhances our product portfolio substantially.
1 Lw 61207 Alt A 8 Nos 2 Lw 61206 Alt A 9 Nos 3 Lw 61198 Alt Nil 8Nos 4 Lw 61201 Alt Nil 8 Nos 5 Lw 61202 Alt Nil -1 No.
001248 Nil Nil (2) Cash-settled derivatives: Nil Nil Nil Nil (3) Stock-settled derivatives (including options) and agreements to purchase/sell: Nil Nil Nil Nil TOTAL: 49,175 0.
Chang Hang Bin Hai Sinotrans 10/09/15 Not Sched 6,674 Steel Nil
297,914 [A] Nil Deferred Bonus Plan** Ben van Beurden
Rainfall for season 2013 Rainfall This Season Last date Isolated Region Week's From Indicated Scattered From 22 to 26 March Rainfall 01 Sept Widespread Kunene Kaoko Nil to 1 358 20 Mar I Owambo Etosha Nil to 20 600 19 Mar I Okavango Nil to 1 556 19 Mar I Caprivi Nil 492 11 Mar Kunene Damara Nil to 1 206 20 Mar I Otjozondjupa North Nil to 1 284 18 Mar I Otjozondjupa Otji Nil to 1 256 16 Mar I Erongo Nil to 1 160 19 Mar I Omaheke Nil to 1 193 15 Mar I Hardap West Nil 38 12 Mar Hardap East Nil 197 12 Mar Karas West Nil 19 4 Mar Karas East Nil 234 5 Mar Central (Khomas) Nil 192 13 Mar