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  2. Sleep mode - Wikipedia

    en.wikipedia.org/wiki/Sleep_mode

    The feature saves the contents of volatile memory to the system hard disk each time the Mac enters Sleep mode. The Mac can instantaneously wake from sleep mode if power to the RAM has not been lost. However, if the power supply was interrupted, such as when removing batteries without an AC power connection, the Mac would wake from Safe Sleep ...

  3. Spinlock - Wikipedia

    en.wikipedia.org/wiki/Spinlock

    Most operating systems (including Solaris, Mac OS X and FreeBSD) use a hybrid approach called "adaptive mutex". The idea is to use a spinlock when trying to access a resource locked by a currently-running thread, but to sleep if the thread is not currently running. (The latter is always the case on single-processor systems.) [8]

  4. Kernel panic - Wikipedia

    en.wikipedia.org/wiki/Kernel_panic

    When a kernel panic occurs in Mac OS X 10.2 through 10.7, the computer displays a multilingual message informing the user that they need to reboot the system. [17] Prior to 10.2, a more traditional Unix-style panic message was displayed; in 10.8 and later, the computer automatically reboots and the message is only displayed as a skippable ...

  5. Blue screen of death - Wikipedia

    en.wikipedia.org/wiki/Blue_screen_of_death

    As mentioned earlier, the insider builds of Windows 10 and later, as well as Windows Server 2016 and later, display a green screen. [26] [27] [24] Windows 10 and later (and Windows Server 2016 and later) also display an orange screen in an extremely rare case where a hardware issue with the GPU or a graphics driver problem is encountered. [47]

  6. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. Macintosh startup - Wikipedia

    en.wikipedia.org/wiki/Macintosh_startup

    The Mac OS X startup screen from versions 10.2 to 10.9, displaying a dark-gray Apple logo on a lighter gray-white background as well as a loading throbber. In 2002, with the release of version 10.2, the Happy Mac symbol was retired and replaced with the Apple logo. Also, in addition to the blinking system folder icon, a prohibition icon was ...

  8. ACPI - Wikipedia

    en.wikipedia.org/wiki/ACPI

    Advanced Configuration and Power Interface (ACPI) is an open standard that operating systems can use to discover and configure computer hardware components, to perform power management (e.g. putting unused hardware components to sleep), auto configuration (e.g. Plug and Play and hot swapping), and status monitoring. It was first released in ...

  9. Busy waiting - Wikipedia

    en.wikipedia.org/wiki/Busy_waiting

    Busy-waiting itself can be made much less wasteful by using a delay function (e.g., sleep()) found in most operating systems. This puts a thread to sleep for a specified time, during which the thread will waste no CPU time. If the loop is checking something simple then it will spend most of its time asleep and will waste very little CPU time.