High Quality Content by WIKIPEDIA articles! Picotux is the smallest computer running Linux in the world. There are several different kinds of picotux available, but the main one is the picotux 100. It is 35 mm × 19 mm × 19 mm and just barely larger than an RJ45 connector. Two communication interfaces are provided, 10/100 Mbit/s half/full duplex Ethernet and a serial port with up to 230,400 bit/s. Five additional lines can be used for either general input/output or serial handshaking. The picotux 100 operates a 55 MHz 32-bit ARM7 Netsilicon NS7520 processor, with 2 MB of Flash Memory (750 KB of which contains the OS) and 8 MB SDRAM Memory. The operating system is Clinux 2.4.27 Big Endian. BusyBox 1.0 is used as main shell. The picotux system runs at 250 mA only and 3.3 V +/- 5%.