{{Short description|German technology company}} {{Infobox company | name = Keil | logo = frameless|upright=0.75|center | founded = 1986 | hq_location = Munich; Plano | industry = Embedded Software | products = compiler, assemblers, debuggers, linkers, IDE, real-time operating systems, evaluation boards | website = {{ubl|{{URL|keil.com}}|{{URL|keil.arm.com}}}} }}
'''Keil''' is a German software subsidiary of Arm Holdings. It was founded in 1982 by Günter and Reinhard Keil, initially as a German GbR.
== Overview == In April 1985 the company was converted to ''Keil Elektronik GmbH'' to market add-on products for the development tools provided by many of the silicon vendors. Keil implemented the first C compiler designed from the ground-up specifically for the 8051 microcontroller.{{Citation needed|date=January 2026}}
Keil provides a broad range of development tools like ANSI C compiler, macro assemblers, debuggers and simulators, linkers, IDE, library managers, real-time operating systems (currently '''RTX5''')<ref>{{Cite web|last=Ltd|first=Arm|title=Keil RTX5 – Arm|url=https://www.arm.com/products/development-tools/embedded-and-software/rtx5-rtos|access-date=2021-04-05|website=Arm {{!}} The Architecture for the Digital World|language=en}}</ref><ref>{{Citation|last=Yiu|first=Joseph|title=Chapter 18 - Using SVC, PendSV, and Keil RTX Kernel|date=2011-01-01|url=https://www.sciencedirect.com/science/article/pii/B9780123854773100187|work=The Definitive Guide to the ARM Cortex-M0|pages=331–359|editor-last=Yiu|editor-first=Joseph|place=Oxford|publisher=Newnes|language=de|isbn=978-0-12-385477-3|access-date=2021-04-05}}</ref><ref>{{Cite book|last1=Ungurean|first1=I.|last2=Gaitan|first2=N. C.|title=2018 International Conference on Development and Application Systems (DAS) |chapter=Performance analysis of tasks synchronization for real time operating systems |date=May 2018|pages=63–66|doi=10.1109/DAAS.2018.8396072|isbn=978-1-5386-1493-8 |s2cid=49537670 }}</ref> and evaluation boards for over 8,500 devices.<ref>{{Cite web|title=MDK Version 5|url=https://www2.keil.com/mdk5|access-date=2021-04-05|website=www2.keil.com}}</ref><ref>{{Cite web|title=MDK5 Device List|url=https://www.keil.com/dd2/|access-date=2021-04-05|website=www.keil.com}}</ref>
In October 2005, Keil (Keil Elektronik GmbH in Munich, Germany, and Keil Software, Inc. in Plano, Texas) were acquired by Arm.<ref>{{Cite web|title=ARM and the man - Tech Design Forum Techniques|url=https://www.techdesignforums.com/practice/technique/arm-and-the-man/|access-date=2021-04-05|website=www.techdesignforums.com}}</ref><ref>{{Cite web|title=Press Release: ARM Drives Momentum in Microcontrollers with Keil Acquisition|url=https://www.keil.com/pr/article/1085.htm|access-date=2021-04-05|website=www.keil.com}}</ref><ref>{{Cite web|title=Corporate Information About Keil|url=https://www.keil.com/company/|access-date=2021-04-05|website=www.keil.com}}</ref>
Since the merger with Arm, the company is still active in providing products and services.<ref>{{Cite web|title=Keil tooling at Embedded World 2021: Cloud Computing|url=https://community.arm.com/developer/tools-software/tools/b/tools-software-ides-blog/posts/arm-keil-development-tools-at-embedded-world-2021|access-date=2021-04-05|website=community.arm.com|language=en}}</ref><ref>{{Cite web|title=Arm Keil MDK for STM32F0, STM32L0 and STM32G0 - Complete software development solution for all STM32F0, STM32L0 and STM32G0 devices. Includes C/C++ Compiler, IDE/Debugger, CMSIS components, RTOS - STMicroelectronics|url=https://www.st.com/en/development-tools/arm-keil-mdk-for-stm32f0-stm32l0-and-stm32g0.html|access-date=2021-04-05|website=www.st.com|language=en}}</ref><ref>{{Cite web|title=Arm FuSa RTS|url=https://www2.keil.com/fusa-rts|access-date=2021-04-05|website=www2.keil.com}}</ref><ref>{{Cite web|title=Keil Product News|url=https://www.keil.com/pr/|access-date=2021-04-05|website=www.keil.com}}</ref>
==See also== *Arm Holdings *ARM architecture family *Embedded system *Mbed
==References== <references />
==External links== *[http://www.keil.com Official site] *[https://www.keil.com/appnotes/ Keil Application notes] *{{github|ARM-software/CMSIS_5/tree/develop/CMSIS/RTOS}} *{{github|arm-software/CMSIS-rtx}}
Category:Software companies of Germany Category:2005 mergers and acquisitions
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