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Distributed OS
can coordinate the processing of a single job across multiple computers to improve performance and resource sharing.
Multi-tasking system
A single processor can appear to do more than one task simultaneously by scheduling processor time among multiple processes, allowing efficient use of resources.
multi user OS
Lots of users with their own terminals access the mainframe’s CPU and each gets a time slice
Mobile Operating Systems
The main OS handles the user interface and running applications while a low-level proprietary OS is used for handling the hardware and special features such as cellular connectivity and wifi
Open source operating systems
Free software which allow for major customisation and fine-tuning to suit devices and additional features
Embedded Operating System
Runs simple programs held in ROM with minimal features
Real time Operating Systems
Some operating systems must operate in real time and respond extremely quickly to inputs
BIOS (Basic Input Output System)
Stores bootstrapper in ROM, Loads OS into RAM when the computer is turned on