Editing TACL (programming language) (section)

==History==
Tandem computers were originally designed and sold by Tandem Computers, Inc., based in [[Cupertino, California|Cupertino, CA]]. These were the first commercially available parallel processing computers. Despite their ability to expand to large sizes using parallelism, later to be called clustering, they were in the category of "mini-computers". Tandem's strategy was the emerging concept of "continuous availability" for applications requiring near-total uptime, in which single points of failure were minimized through mirrored storage devices, controllers and software, and operating systems engineered specifically for fault tolerance (using the Guardian operating system, later NonStop Kernel or NSK, and later NonStop OS). In computing, a [[single point of failure]] refers to any scenario in which the failure of a single component, application or process could result in broader impacts such as data loss or the cascading failure of the system. The relative likelihood of multiple component or process failures within a short time is considered much lower than the likelihood a single failure.

Tandem Computers, Inc. was acquired by [[Compaq|Compaq Computer Corporation]] in 1997; and Compaq Computer Corp. was subsequently purchased by [[Hewlett-Packard]] in 2001. Today they are known as "[[NonStop (server computers)|HPE Nonstop]]", with products such as the HP Integrity NonStop Blade systems.<ref name=":0">{{cite web | publisher = Hewlett-Packard Development Company
| url=http://h20223.www2.hp.com/nonstopcomputing/cache/595857-0-0-224-121.html | title = HP Integrity NonStop BladeSystem NB50000c - overview | year = 2001 | accessdate = 12 October 2012}}</ref>

In 2022, HPE NonStop platforms underpin many of the largest banks, casinos, retailers, telephone companies, email systems, and stock exchanges worldwide. TACL continues to be the scripting language used on NonStop Servers.