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User. The "/usr" directory hierarchy on Unix systems. Once upon a time, in the early days of Unix, this area actually held users' home directories and files. Since these tend to expand much faster than system files, /usr would be mounted on the biggest disk on the system. The root directory, "/" in contrast, contains only what is needed to boot the kernel, after which /usr and other disks could be mounted as part of the multi-user start-up process.

/usr has been used as the "everything else" area, with many "system" files such as compiler libraries (/usr/include, /usr/lib), utilty programs (/usr/bin, /usr/ucb), games (/usr/games), local additions (/usr/local), manuals (/usr/man), temporary files and queues for various daemons (/usr/spool). These optional extras have grown in size as Unix has evolved and disks have dropped in price. Under later versions of SunOS, the user files have fled /usr altogether for a new "/home" partition and temporary files have moved to "/var". This allows /usr to be mounted read-only with some gain in security and performance since access times are not updated for files on read-only file systems.
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U.S. Robotics

(U.S. Robotics, Inc., Schaumburg, IL, An earlier analog modem manufacturer highly regarded for its quality products. U.S. Robotics (USR) was an innovative company that manufactured its own chipsets (data pumps), and its Sportster models were the best-selling modems in the world. USR's HST protocol was a high-speed, reliable protocol before V.32bis became a modem standard in 1991.

In 1997, USR became part of 3Com in the largest merger in data networking history. In 2000, it was spun off as a private, independent company formed by 3Com, Accton Technology Corporation and NatSteel Electronics, Ltd. In 2013, UNICOM Global acquired the company. See 3Com and analog modem.

The Sportster Modem
As people went online by the droves in the 1990s, modems from U.S. Robotics were a common sight. (Image courtesy of 3Com Corporation.)
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References in periodicals archive ?
Organized by Abu Dhabi University in collaboration with the Ministry of Community Development, the forum served to encourage a greater understanding of USR by highlighting the fundamental role it plays within the greater higher education ecosystem.
USR has until August 2019 to decommission its plants on Shady Oaks Drive and on Jim Christal Road.
En effet, les USR ont recens[euro]u[c] durant lae1/4aoann[euro]u[c]e 2000, 19 025 accidents alors que le parc automobile comptait 2 947 517 v[euro]u[c]hicules.
* Whether the commissioners erred in approving a USR application where the uncontroverted evidence demonstrated the proposed industrial use would violate the applicable noise standard.
The Army Strategic Readiness Assessment redesign expands on the USR and SRU in three primary ways; it--
He said that he is excited by the opportunity to help guide the future of USR Holdings and Amethyst Recovery Center.
USR staffers are paying door to door visits to check houses, palazas, factories, and huge government buildings in the city, he maintained.
USR staffers are paying door to door visits to check houses, palazas, factories and huge government buildings in the city, he maintained.
Serving as a global platform to connect and foster partnership among members, the USR Network shares ideas and resources to develop collaborative USR projects with varied scope and scale, advancing higher education as a catalyst for social change through education, research and community service.
Among the disease pathogens Ganoderma species which cause basal stem rot (BSR) and upper stem rot (USR) are the most devastating to the oil palm (Hasan et al.
USR, the first event of its kind in the Middle East, featured the competition for UAE tertiary students.
Willingham is tasked with driving operational excellence objectives across the organization, and will be closely involved in developing and executing USR's strategic plans in both the domestic and the emerging international markets.