The "operating system for embedded smart objects", Contiki, has been updated to version 2.4 with new experimental platforms and improved stability. The BSD licensed operating system is designed to be small, highly portable and work in networked, but memory constrained systems, such as sensor network nodes. Typical configurations can use as little as 2KB of RAM and 40KB of ROM and Contiki has been ported to computers such as the Commodore 64 and microcontrollers such as the TI MSP430 and Atemel AVR.