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1. An object-oriented deductive language and database system integrating logic programming and inheritance.

["LOGIN: A Logic Programming Language with Built-In Inheritance", H. Ait-Kaci et al, J Logic Programming 3(3):185-215 (1986)].
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

log in

Signing in and gaining access to a computer, local network server, Web server or to a particular account. The login identifies the user, and a username and password are typically required. Although a password is not mandatory for a user's own computer or mobile device, it is always recommended. See password, username and account.

Variations and Spelling
Also called "log on," "sign in" or "sign on," the action of logging in (verb) is spelled with two words: "please log in." However, the process (noun) is one word: "the login." In contrast, to exit the system is to "log out," "log off," "sign out" or "sign off." For example: "be sure to log in" and "her login name is allison77."

Right and Wrong Usage
The verb is two words; the noun is one. Many user interface designers are unaware of this distinction.
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References in periodicals archive ?
'Though two-factor authentication is widely accepted as a method to ensure user logon security, macOS does not provide a way to enable this feature for the domain computers,' says Parthiban Paramasivam, director of product management, ADSelfService Plus.
Mobile devices are the most popular with a 38% increase in logons compared to last year, with an average of 18% more customers logging on via their mobile rather than their desktop.
Online banking logons have significantly increased to 60 million each month, according to the Halifax Digital Dashboard, with more customers preferring to use mobile devices over their desktop computers to sign into their accounts.
State servers are used to track network equipment load and to limit the number of simultaneous logons.--XPerience Technologies
In the first six months of operation, January-June, 1990, the library recorded a total of 2,274 logons representing 216 hours and three minutes.
Employees will have 90 days from receipt of a course logon to complete this two-hour course and exam.
Recalling which passwords and logon procedures apply to what applications is a task in itself.
This logon does not give them access to clinical data, which can only be accessed via AutoChart and AutoChart's own logon ID/password.
OCLC has added new options to The FirstSearch Catalog's subscription pricing, including an expanded base package, volume discounts for multiple logon authorizations, and customized database selection in which libraries can subscribe to and pay only for the databases they select.