PicoBSD is a single-floppy disk version of FreeBSD, one of the Berkeley Software Distribution operating system descendants. In its different variations, PicoBSD allows one to have secure dialup access, a small diskless Router, or even a dial-in server, all on only one standard 1.44MB floppy. It runs on a minimum Intel 80386SX Central processing unit with 8MB of Random Access Memory (no hard disk required).

PicoBSD s use may move from being primarily floppy based to being used more often on systems with at least a small amount of flash memory storage and perhaps no hard drive.

With flexibility that FreeBSD gives, along with the full source code being available, one can build a small installation performing various tasks, including (but not limited to):

*Diskless workstation *Portable dial-up access solution *Custom demo-disk *Embedded controller (flash memory or EEPROM) *Firewall (networking) *Communication server *Replacement for commercial router *Diskless home-automation system *And many others

In FreeBSD 5, it has been superseded by the NanoBSD framework.

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