Zena Hussain Fahad, Ansam Ahmed Alwan, Zena Tariq Nayyef, Validation and Availability Techniques for Computer Faults, Journal of Engineering and Applied Sciences, Volume 14,Issue 3, 2019, Pages 785-788, ISSN 1816-949x, jeasci.2019.785.788, (https://makhillpublications.co/view-article.php?doi=jeasci.2019.785.788) Abstract: Users are not concerned with the computer faults but they need the computer working in a correct mode. Specially, in critical circumstances. Fault Computing (FC) plays a important role, especially, since, early 50’s. This area opens a wide aspect to be researched area, this study involves varieties of categorizations of techniques towards the effort to make system fault tolerant, modeling and testing helping with system development and bench-marking to evaluate and compare systems. The concept, modeling and methodology of fault tolerant computing are very much controversial to software while they are considered fairly mature for hardware. Often refer to real-time critical system embedded systems. Faculty tolerant computing far from strictly application the system development and operational process in the above area. Keywords: Fault and their manifestation;system fault response stages;validation and availability techniques;FC;techniques;application