Unicode Data
Unicode, a character standard codes, using 16-bit (BIT) to encode, you can cover the common language of the common vocabulary.

UNIX Operating System
Common in workstation and server operating systems. The most common versions of UNIX, including Sun's Solaris, HP's HP-UX, IBM's AIX, and SCO's UnixWare. There are many IBM mainframe (mainframe) are also the implementation of UNIX. Linux can also be regarded as the deformation versions of UNIX, is there in the early 1990s, there are now gradually override the UNIX trends. UNIX is written in C language, be it UNIX or C language is developed by AT & T, and free to grant the use of government or academic institutions, which makes UNIX has been widely transplanted in a number of hardware, machines, rated far beyond any other operating system. UNIX was first reported by the AT & T, developed by Ken Thompson, who PDP-7 computer in order to simplify the rather complex MULTICS operating system. UNIX name that is, from the Uno (single-user version) and "multIX" combination. Later, Dennis Ritchie has also made considerable improvements to the 1974, UNIX in academic circles and technology circles is quite welcome. University of California, Berkeley, and later for UNIX to do quite a lot of improvements, many UNIX versions of Berkeley has an extension. By the 1980s, AT & T began to integrate into a number of UNIX versions of standards, and evolved into System III, and, later, System V. In 1984, before the split, AT & T will be UNIX universities and numerous agencies licensed to use, but not the product marketing activities. After separation, AT & T began actively promoted UNIX. In 1989, AT & T setting up UNIX Software Operations (USO) introduction of System V Release 4.0 (SVR4), which is integrated XENIX, SunOS, Berkeley 4.3BSD and System V as a single standard. Define the UNIX compatibility SVID definition in this time to come. USO in 1990 and renamed the USL (UNIX System Laboratories). In 1993, Novell bought UNiX source code, and later in 1995 the company sold to SCO. UNIX versions of many, many people had hoped that a single universal standard, to emulate DOS, Windows or Mac operating system, the practice of such suit. However, UNIX has been used in too many hardware platforms, so the only way is to use an intermediate language similar to Java in order to make a single UNIX used on all platforms. In fact, UNIX application developers really want to do a single UNIX programming interface (API), so they can simply be recompiled for each platform, the code can be, rather than spent to maintain each of the different versions of the source. At present, x / Open the organization regulated Singe Unix Specification standard, but the software will be compatible with UNIX will be marked with labels. Although the version number, but UNIX in the client / server, or transaction processing systems using a wide range of mission-critical applications. UNIX components are world-class standards such as TCP / IP networking to send SMTP e-mail agreements and the substance of the agreement are standard on the network; NFS allows files to access the network environment; Kerberos to provide Internet security; NIS to provide Yellow Pages-style directory; X Windows allows users to run their machines on the remote server applications.

UnPBX CTI, call telephony integration
This is the area of computer telephony integration CTI-specific terminology, which refers to industrial PC (commonly known as the IPC) to replace the traditional PBX switching system, using a special voice resource card, or fax card, to replace the traditional PBX performs call switching reservations, fax ..., and other acts, but in general, can load the volume of services lower than the PBX. The science and technology vocabulary I learn from the text provided by the User.

unsolicited, without consent; uninvited
In the e-mail marketing speaking, refers to e-mail advertisements sent, especially the commercial advertisement or any message sent before, does not have the basis for the consent of the parties would normally be treated as spam.
Usually litterbugs are collected by various means, take the initiative to the list of e-mail addresses, then mass mailing, and therefore commercial advertisements or any message sent before the recipient has not obtained prior permission or consent.
On the contrary, usually formal marketing industry in sending commercial advertising, its e-mail list is the basis for the consent of the parties. The most common is to "opt-in" (opt) mechanism to allow the recipient an e-mail list, and even the sake of prudence, opt-in process will have a second to confirm the hand sequence to ensure that the income Indeed, the sender would like to receive commercial messages.
On the effectiveness of advertising as far as junk e-mail without the user's consent, have not been invited, while the disruption to users, so that the recipient actually customary to delete the message, so advertising effectiveness is relatively limited. As amended by the user's consent before sending advertising messages, due to the recipient's identity, thus better advertising effectiveness.

UPS Uninterruptible Power Supply
Uninterruptible power systems, power outages in the city can continue to provide short-term electricity system is divided into two kinds: 1. STANDBY: When electricity is interrupted, the switch to battery-powered, switch the process there will be a very short period of time without electricity .2 . ON-LINE: electricity first, and then sent through UPS, power outages are still ongoing, there is no interval, but more expensive. Some UPS and to provide communications capabilities to the computer monitor UPS status.