Operating Systems

Operating Systems

1. Its functions

   • It is a reliable mode to node the hardware and the software as the software doesn't need to know all the features of the hardware to work
     • It provides an interface to the user
   • It manages the hardware and software resources of the system. They work the same in a computer or in a cell phone
     • It is also used to be a task, file and resources administrator
       • It works as a support of utilities and support

2. Types of OS

   • Real time
     • These ones are thought to be useful for the use of quick responses to diverse events. They often use specialized scheduled algorithms
   • Multi-user
     • These ones are simple, they allow the use of the same server at the same time
   • Multi-tasking vs. single-tasking
     • Pre-emptive
       • It divides the time and the CPU power in parts so it can be more efficient.
     • Co-operative
       • The process that this OS follows gives the application that needs boost help using an other application
   • Embedded
     • 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
   • Distributed
     • A distributed operating system is a software over a collection of independent, networked, communicating, and physically separate computational nodes. Each individual node holds a specific software subset of the global aggregate operating system.

3. How do they work?

   • When they receive an order from the hardware, the OS has the duty to make it happen, we can say that it makes the hardware and the software to understand each other,
     • For example
       • If Paint (Application) requires to do an action, the OS (imagine Windows 8)
         • Then the OS makes that the movements with the mouse are transported to the drawing and can be later saved, and printed (that is another connection for the OS, the monitor or printer)

4. What are they?

   • Operating systems are an essential part of the computer. Every device that needs a CPU has an OS. OS are software whose function is to control the software of a computer and make a management of the services it can provide
     • OS like
       • DOS
       • MacOS
       • Windows
       • Linux

5. Its developements

   • Internet connection
     • OS nowadays use it so much that it would be really hard to conceive the image of the Operating Systems without it
       • Since the starting of the OS, everytime, nodes between computers have been more frequent and use
     • OS have been evolving pretty much, connectivity between servers and optimization of software, moreover, OS are everytime more develepode, who knows what can be next?