P.I.P.S.

P.I.P.S. is a term (recursive acronym) for Symbian software libraries that means, P.I.P.S. Is POSIX on Symbian OS. It is intended to help C language programmers in migration of desktop and server middleware, applications to Symbian OS based mobile smartphone devices. 
Software libraries.
The PIPS software libraries provides C and C++ application programming interfaces in standard C libraries such as 
Limitations.
The P.I.P.S. environment does not support true signalling. Basic signal support is emulated using threads.
Extensions and successors: Open C and Open C++.
Open C and Open C++ are extensions by Nokia of P.I.P.S. In contrast to mere P.I.P.S., they were only for Series 60 phones. 
Naming.
The name was the result of an internal competition in the Symbian Developer Marketing department, organised by Bruce Carney (Developer Marketing) and Erik Jacobson (Product Manager). The full-stops were inserted by Symbian's Legal department to ensure there were no trademark or copyright infringements.