GNUCash – is an accounting program that implements a double-entry bookkeeping system
RCAOpen-SourceApplication (ROSA) - is an open-source management accounting application that aims to provide decision support information to managers.
ResourceConsumptionAccounting (RCA) - is a principle-based approach to management accounting that combines German management accounting techniques known as Grenzplankostenrechnung (GPK)
Linux OS - is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds.
Embedded Systems - combination of computer hardware and software designed for a specific purpose.
Ubuntu OS - is a Linux distribution that is mostly composed of free and open-source software.
Canonical - they developed ubuntu and a community of other developers, under a meritocratic governance model.