21 Facts About Operating systems

Operating systems did not exist in their modern and more complex forms until the early 1960s.

When personal computers became popular in the 1980s, operating systems were made for them similar in concept to those used on larger computers.

Development of computer operating systems have materially aided the problem of getting a program or series of programs on and off the computer efficiently.

One of the more famous examples that is often found in discussions of early Operating systems is the Atlas Supervisor, running on the Atlas in 1962.

In cooperation with the University of Minnesota, the Kronos and later the NOS operating systems were developed during the 1970s, which supported simultaneous batch and timesharing use.

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Early Operating systems had utilized microprogramming to implement features on their Operating systems in order to permit different underlying computer architectures to appear to be the same as others in a series.

Enormous investment in software for these systems made since the 1960s caused most of the original computer manufacturers to continue to develop compatible operating systems along with the hardware.

MacOS is a line of open core graphical operating systems developed, marketed, and sold by Apple Inc, the latest of which is pre-loaded on all currently shipping Macintosh computers.

Operating systems posted information about his project on a newsgroup for computer students and programmers, and received support and assistance from volunteers who succeeded in creating a complete and functional kernel.

Microsoft Windows is a family of proprietary operating systems designed by Microsoft Corporation and primarily targeted to Intel architecture based computers, with an estimated 88.

Yet other operating systems are used almost exclusively in academia, for operating systems education or to do research on operating system concepts.

Operating systems system provides an interface between an application program and the computer hardware, so that an application program can interact with the hardware only by obeying rules and procedures programmed into the operating system.

Early operating systems generally supported a single type of disk drive and only one kind of file system.

Early file Operating systems were limited in their capacity, speed, and in the kinds of file names and directory structures they could use.

Operating systems tend to recommend using file systems specifically designed for them; for example, NTFS in Windows and ReiserFS, Reiser4, ext3, ext4 and Btrfs in Linux.

Support for file systems is highly varied among modern operating systems, although there are several common file systems which almost all operating systems include support and drivers for.

Computers and their operating systems cannot be expected to know how to control every device, both now and in the future.

Security of operating systems has long been a concern because of highly sensitive data held on computers, both of a commercial and military nature.

An alternative strategy, and the only sandbox strategy available in systems that do not meet the Popek and Goldberg virtualization requirements, is where the operating system is not running user programs as native code, but instead either emulates a processor or provides a host for a p-code based system such as Java.

Internal security is especially relevant for multi-user Operating systems; it allows each user of the system to have private files that the other users cannot tamper with or read.

Many computer operating systems allow the user to install or create any user interface they desire.