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  2. Apple Push Notification service - Wikipedia

    en.wikipedia.org/.../Apple_Push_Notification_service

    Apple Push Notification service (APNs), previously known as Apple Push Service (APS), is a platform notification service created by Apple Inc. that enables third party application developers to send notification data to applications installed on Apple devices. The notification information sent can include badges, sounds, newsstand updates, or ...

  3. Issues relating to iOS - Wikipedia

    en.wikipedia.org/wiki/Issues_relating_to_iOS

    The iOS mobile operating system developed by Apple has had a wide range of bugs and security issues discovered throughout its lifespan, including security exploits discovered in most versions of the operating system related to the practice of jailbreaking (to remove Apple's software restrictions), bypassing the user's lock screen (known as lock screen bypasses), issues relating to battery ...

  4. List of built-in iOS apps - Wikipedia

    en.wikipedia.org/wiki/List_of_built-in_iOS_apps

    Users are also able to subscribe to other calendars from friends or third parties. Since iOS 5, Calendar supports online cloud backup of calendars using Apple's iCloud service, or synchronization with other calendar services, including Google Calendar and Microsoft Exchange Server. With iOS 18, users can see reminders in the calendar app as ...

  5. Fix problems with the AOL app on iOS

    help.aol.com/articles/fix-problems-with-the-aol...

    Verified for iOS 9.3 and later. 1. Double press the Home button or swipe up and hold. 2. Swipe up on the image of the app. 3. Re-launch the app and attempt to reproduce the issue.

  6. iPhone 11 Pro - Wikipedia

    en.wikipedia.org/wiki/IPhone_11_Pro

    The iPhone 11 Pro has a 5.85 inch (149 mm) (marketed as 5.8-inch (15 cm)) OLED display with a resolution of 2436 × 1125 pixels (2.7 megapixels), while the iPhone 11 Pro Max has a larger 6.46 inch (164 mm) (marketed as 6.5-inch (17 cm)) OLED display with a resolution of 2688 × 1242 pixels (3.3 megapixels) which both have a pixel density of 458 ...

  7. Why did I receive an email from MAILER-DAEMON? - AOL Help

    help.aol.com/articles/what-is-a-mailer-daemon...

    This often means your email address has been blocked from sending mail to a specific contact because your address has been blocked by privacy or spam control settings set by the owner of that account. Should this happen, you'll need to check with that contact to make sure you haven't been accidentally added to their blocked or spam list.

  8. Inter-process communication - Wikipedia

    en.wikipedia.org/wiki/Inter-process_communication

    In computer science, interprocess communication (IPC) is the sharing of data between running processes in a computer system. Mechanisms for IPC may be provided by an operating system . Applications which use IPC are often categorized as clients and servers , where the client requests data and the server responds to client requests. [ 1 ]

  9. Signal (IPC) - Wikipedia

    en.wikipedia.org/wiki/Signal_(IPC)

    The sigprocmask(2) call can be used to block and unblock delivery of signals. Blocked signals are not delivered to the process until unblocked. Signals that cannot be ignored (SIGKILL and SIGSTOP) cannot be blocked. Signals can cause the interruption of a system call in progress, leaving it to the application to manage a non-transparent restart.