Open Source Pascal Operating Systems

Vaio DOS is the greatest DOS distribution of all the times. You may freely use it for personal purpose on a retrocomputer at your own risk. Either way, I'll appreciate knowing you have found it to be helpful, my dear friend. The distro was tested on the Sony Vaio PCG-VX88 (PCG-551L) laptop. It supports networking, USB sticks, and whatnots. Cheers!

DaVinci Operating System is an Operating System craeted by Tóca CompuGlobal Corporation,Inc based on openSUSE 13.1 and GNU Linux. It´s currently 64 BITS and UEFI devices only.

DinoX is an operation system , that written in pascal and assembler.

EXIRION/OS is an operating system for embedded computer systems. These operating systems are designed to be compact, efficient at resource usage, and reliable, forsaking many functions that non-embedded computer operating systems provide, and which may not be used by the specialized applications they run. They are frequently also referred to as real-time operating systems, and the term RTOS is often used as a synonym for embedded operating system. EXIRION/OS project, a Open operating system for computers that can be used in specific operations that require execute a task at a time, EXIRION/OS operating system is a monolithic and mono layered task, which can be used to control complex electronic equipment without the use of instruments PLC, offering a wide range of electronic and industrial applications, EXIRION/OS is also an educational tool, it is an open source operating system to use it as an example of building operating systems in universities and technical colleges.

open source analogue of IBM OS/2 operating system