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The term "ansible" was coined by Ursula K. Le Guin in her 1966 novel Rocannon's World, [4] and refers to fictional instantaneous communication systems.[5] [6]The Ansible tool was developed by Michael DeHaan, the author of the provisioning server application Cobbler and co-author of the Fedora Unified Network Controller (Func) framework for remote administration.
Semaphore is a hosted continuous integration and deployment service used for testing and deploying software projects hosted on GitHub and BitBucket. [1]While open source projects can use Semaphore for free in its full capacity, free use for private projects is limited to 100 builds per month (Semaphore Classic) or $20 of service every month (Semaphore 2.0).
Semaphore Corporation [1] was a company notable for being the first to provide public access to selected U.S. Postal Service databases, [2] and for its early computer publications in the 1980s. Founded in January 1982, the company operated for 35 years through September 2017.
wait: Decrements the value of the semaphore variable by 1. If the new value of the semaphore variable is negative, the process executing wait is blocked (i.e., added to the semaphore's queue). Otherwise, the process continues execution, having used a unit of the resource. signal: Increments the value of the semaphore variable by 1. After the ...
Semaphore (lit. ' apparatus for signalling '; from Ancient Greek σῆμα (sêma) 'mark, sign, token' and Greek -φόρος (-phóros) 'bearer, carrier') [1] is the use of an apparatus to create a visual signal transmitted over distance. [2] [3] A semaphore can be performed with devices including: fire, lights, flags, sunlight, and moving arms.
Semaphore is the use of an apparatus with telegraphy to create a visual signal transmitted over long-distances. It may refer more specifically to: Flag semaphore; Semaphore telegraph, a system of long-distance communication based on towers with moving arms; Railway semaphore signal for railway traffic control
In computer networking, Semaphore Flag Signaling System (SFSS) is a humorous proposal to carry Internet Protocol (IP) traffic by semaphores.Semaphore Flag Signaling System was initially described in RFC 4824, [1] an April Fools' Day RFC issued by the Internet Engineering Task Force edited by J. Hofmueller, et al. and released on April Fools' Day 2007.
A hydraulic telegraph (Greek: υδραυλικός τηλέγραφος) refers to two different semaphore systems involving the use of water-based mechanisms as a telegraph. The earliest one was developed in 4th-century BC Greece, while the other was developed in 19th-century AD Britain.