Currently I have information about a port for the Psion 5 and nothing
about the Psion 3 series.
is a set of libraries and utilities for enabling Unix (mainly Linux)
systems to communicate with a Psion palmtop over a serial line. On Linux, a
connection over IrDA, using the IrCOMM feature is also possible. A shared
library encapsulates the highlevel protocol (PsionLinkProtocol) and thus
makes it easy to write applications without extensive knowledge of the
protocol itself. A daemon (ncpd) handles the serial connection and provides
it's services on a local TCP socket.
is a project to port the unix-like operating system Linux to a small
group of palmtops.