A conventional computer operating system usually segregates virtual memory into kernel space and user space. Kernel space is strictly reserved for running the kernel, kernel extensions, and most device drivers. In contrast, user space is the memory area where all user mode applications work and this memory can be swapped out when necessary.

Similarly, the term userland refers to all application software that runs in user space. Userland usually refers to the various programs and libraries that the operating system uses to interact with the kernel: software that performs input/output, manipulates file system objects, etc.

Each user space process normally runs in its own virtual memory space, and, unless explicitly requested, cannot access the memory of other processes. This is the basis for memory protection in today's mainstream operating systems, and a building block for privilege separation. Depending on the privileges, processes can request the kernel to map part of another process's memory space to its own, as is the case for debuggers. Programs can also request shared memory regions with other processes.

Wolfgang Menzel (June 26, 1798 - April 23, 1873), German poet, critic and literary historian, was born at Waldenburg (Wałbrzych) in Silesia.

He studied at Breslau, Jena and Bonn, and after living for some time in Aarau and Heidelberg finally settled in Stuttgart, where, from 1830 to 1838, he had a seat in the Württemberg Diet.

His first work, a clever and original volume of poems, entitled Streckverse (Heidelberg, 1823), was followed in 1824-1825 by a popular Geschichte der Deutschen in three volumes and in 1829 and 1830 by Rubezahl and Narcissus, the dramatized fairy-stories upon which his reputation as a poet chiefly rests.

In 1851 he published the romance of Furore, a lively picture of the period of the Thirty Years' War; his other writings include Geschichte Europas, 1789-1815 (2 vols. Stuttgart, 1853), and histories of the German War of 1866 and of the Franco-German War of 1870-71.

From 1826 to 1848 Menzel edited a Literaturblatt in connection with the Morgenblatt; in the latter year he transferred his allegiance from the Liberal to the Conservative party, and in 1852 his Literaturblatt was revived in that interest.

Adam Whitney Savage (born July 15, 1967) is an American industrial design and special effects designer/fabricator, actor, educator, and co-host of the Discovery Channel television series MythBusters. His model work has appeared in major films, including Star Wars: Episode II - Attack of the Clones and The Matrix Reloaded. He is a prominent member of the skeptic community. He lives in San Francisco with his twin sons and wife, Julia.

Born in New York City, Savage was raised in Sleepy Hollow in Westchester County New York. He graduated from Sleepy Hollow High School in 1985. His father, Whitney Lee Savage (1928-1998), was a painter, filmmaker and animator known for his work on Sesame Street, and has a permanent exhibit in the Avampato Discovery Museum. His mother is a psychotherapist. His sister Kate Savage is also an artist. As a teenager in Sleepy Hollow, he routinely visited the local bike shop to have flat tires fixed. The shop showed him how to do the repairs himself. From this experience, Savage said, "I realized you could take a bike apart and put it back together and it wasn't that hard...I've been building and putting bicycles together since then."