-OPERATING SYSTEMS-

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-as of [19 FEBRUARY 2026]-

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-[DESKTOP] OPERATING SYSTEMS-

-[MOBILE] OPERATING SYSTEMS-

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-[APPLE] OPERATING SYSTEMS-

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-UNIX-

(“UNI-PLEXED INFORMATION + COMPUTING SERVICE”)

(PUN (?) ON “MULTICS”)

(“MULTI-PLEXED INFORMATION + COMPUTING SERVICE”)

(A PROJECT THAT THE ‘UNIX CREATORS’ HAD WORKED ON)

(THEIR BIGGEST INFLUENCE)

(AND I LIKE THAT THEY USED ‘X’ INSTEAD OF ‘CS’)

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-GNU-

(“GNU NOT UNIX”)

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-SHELL-

-COMPUTER WINDOWS-

-SCREEN “HOTSPOTS”-

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-an operating system (OS) is ‘system software’ that manages computer ‘hardware’ + ‘software’ resources + provides common services for ‘computer programs’-

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(all ‘computer programs’ (excluding ‘firmware’) require an ‘operating system’ to function)

(‘time-sharing operating systems’ schedule ‘tasks’ for efficient use of the
‘system’ and may also include ‘accounting software’ for ‘cost allocation’ of ‘processor time’, ‘mass storage’, ‘printing’, and other ‘resources’)

(for ‘hardware functions’ such as ‘input’ / ‘output’ and ‘memory allocation’, the operating system acts as an ‘intermediary’ between ‘programs’ and the ‘computer hardware’, although the ‘application code’ is usually executed directly by the ‘hardware’ and frequently makes ‘system calls’ to an ‘OS function’ or is interrupted by it)

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(‘operating systems’ are found on many devices that contain a ‘computer’…)
(from ‘simplest’ – ‘most complex’?)

‘cellular phones’

‘video game consoles’

‘web servers’

‘super-computers’

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(‘linux’ is dominant in the ‘server’ + ‘super-computing’ sectors)

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(other specialized classes of ‘operating systems’ (such as ’embedded’ + ‘real-time’ systems) exist for many ‘applications’)

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*๐Ÿ‘จโ€๐Ÿ”ฌ๐Ÿ•ต๏ธโ€โ™€๏ธ๐Ÿ™‡โ€โ™€๏ธ*SKETCHES*๐Ÿ™‡โ€โ™‚๏ธ๐Ÿ‘ฉโ€๐Ÿ”ฌ๐Ÿ•ต๏ธโ€โ™‚๏ธ*

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๐Ÿ“š๐Ÿ“–|/\-*WIKI-LINK*-/\|๐Ÿ“–๐Ÿ“š

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๐Ÿ‘ˆ๐Ÿ‘ˆ๐Ÿ‘ˆโ˜œ*-SYSTEM SOFTWARE-* โ˜ž ๐Ÿ‘‰๐Ÿ‘‰๐Ÿ‘‰

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๐Ÿ’•๐Ÿ’๐Ÿ’–๐Ÿ’“๐Ÿ–ค๐Ÿ’™๐Ÿ–ค๐Ÿ’™๐Ÿ–ค๐Ÿ’™๐Ÿ–คโค๏ธ๐Ÿ’š๐Ÿ’›๐Ÿงกโฃ๏ธ๐Ÿ’ž๐Ÿ’”๐Ÿ’˜โฃ๏ธ๐Ÿงก๐Ÿ’›๐Ÿ’šโค๏ธ๐Ÿ–ค๐Ÿ’œ๐Ÿ–ค๐Ÿ’™๐Ÿ–ค๐Ÿ’™๐Ÿ–ค๐Ÿ’—๐Ÿ’–๐Ÿ’๐Ÿ’˜

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*๐ŸŒˆโœจ *TABLE OF CONTENTS* โœจ๐ŸŒท*

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๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ*we won the war* ๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ