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Contiki
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<p>Contiki is an <a href="/facts/Operating_system/8XTuvMh2">operating system</a> for networked, memory-constrained systems with a focus on low-power wireless <a href="/facts/Internet_of_Things/rwwGAxn3">Internet of Things</a> (IoT) devices. Contiki is used for systems for <a href="/facts/Street_light/Uuw2oH1y">street lighting</a>, sound monitoring for <a href="/facts/Smart_cities/RkmIVQC3">smart cities</a>, <a href="/facts/Radiation_monitoring/whKjgMo9">radiation monitoring</a> and alarms. It is <a href="/facts/Open-source_software/HzTaB8E9">open-source software</a> released under the <a href="/facts/BSD_licenses/XLtmLp5x">BSD-3-Clause</a> license. </p><p>Contiki was created by <a href="/facts/Adam_Dunkels/Jvt6Ewb2">Adam Dunkels</a> in 2002 and has been further developed by a worldwide team of developers from Texas Instruments, Atmel, Cisco, <a href="/facts/ENEA_(Italy)/F44NAfd7">ENEA</a>, <a href="/facts/ETH_Zurich/IxHAFGUU">ETH Zurich</a>, Redwire, <a href="/facts/RWTH_Aachen_University/m85nNsAH">RWTH Aachen University</a>, Oxford University, SAP, Sensinode, <a href="/facts/Swedish_Institute_of_Computer_Science/ulHGruNN">Swedish Institute of Computer Science</a>, ST Microelectronics, Zolertia, and many others. Contiki gained popularity because of its built in TCP/IP stack and lightweight <a href="/facts/Preemption_(computing)/wjgIbWel">preemptive scheduling</a> over <a href="/facts/Event-driven_architecture/THC25H6E">event-driven</a> <a href="/facts/Kernel_(operating_system)/uEj4U3Rz">kernel</a> which is a very motivating feature for IoT. The name <i>Contiki</i> comes from <a href="/facts/Thor_Heyerdahl/WndErzeM">Thor Heyerdahl</a>'s famous <a href="/facts/Kon-Tiki/8l7jE7t8">Kon-Tiki</a> raft. </p><p>Contiki provides multitasking and a built-in <a href="/facts/Internet_Protocol_Suite/KNkxtSpw">Internet Protocol Suite</a> (TCP/IP stack), yet needs only about 10 <a href="/facts/Kilobyte/jIe6t4yv">kilobytes</a> of <a href="/facts/Random-access_memory/DuD4bxh6">random-access memory</a> (RAM) and 30 kilobytes of <a href="/facts/Read-only_memory/P9QMuDLH">read-only memory</a> (ROM). A full system, including a <a href="/facts/Graphical_user_interface/wBlQFWDP">graphical user interface</a>, needs about 30 kilobytes of RAM. </p><p>A new branch has recently been created, known as <a href="http://contiki-ng.org/">Contiki-NG</a>: The OS for Next Generation IoT Devices </p>