In the Linux kernel, a mnemonic to remember the Magic SysRq key sequence for safe reboot. unRaw / tErminate / kIll / Sync / Unmount / reBoot Raising Elephants Is So Utterly Boring. Reboot Even If System Utterly Broken.

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The protocol data units (PDUs) for the OSI model are Data, Segment, Packet, Frame, Bit Do Some People Fear Binary?

There are many mnemonics for the seven layers of the OSI Model in computing. Physical / Data Link / Network / Transport / Session / Presentation / Application. Because the layers are numbered from the bottom-up, many mnemonics have been developed in both directions, from the top down and from the bottom up: People Desperately Need To See Pamela Anderson. Please Do Not Throw Sausage/Salami Pizza Away - starts at layer 1 (the bottom),