X Window UNIX Graphics User Interface
UNIX operating systems use graphical user interface system itself does not provide window management system, but the use of X PROTOCAL to communicate with the input-output devices, meaning that X WINDOW provide the most basic graphical interface and screen, keyboard, slide the management of devices such as mice, so that application developers have a common basis. So long as one follows the standard X applications developed X-almost all the UNIX implementation of the X WINDOW system implementation. X WINDOW mode of operation is the master-slave type of approach, SERVER and CLIENT can be spread over both ends of the network through the Internet to send X PROTOCAL, programs can run in a console, while in another computer for display and input, of course, at the same the implementation of computer and display. There is a has the means to communicate with the host X PROTOCAL terminals (TERMINAL) is called X TERMINAL. since they are not window management system, use a different window management systems can have different appearance and mode of operation , for example, there is a window management system enables images and the mode of operation appeared to be very similar to the MICROSOFT WINDOWS 95, also has a window so that it looked like NEXTSTEP management system that can be largely free of charge.

X.25
X.25 is one of the early data communications networks. X.25 can guarantee the receiving end will certainly be able to receive data transmitted by the sender, the Department using the link on the link way.
X.25 has the advantage of affordable easy to install. X.25 rate of up to 56K bps. X.25 The disadvantage is that repeated error-checking process is quite time-consuming and longer transmission time.

X86 processor
x86 refers to Intel's microprocessors produced in series collectively referred to as personal computers, began in 1982 and launched in 80286, before the 8086/8088. x 86, including 386DX/SX/SL family, the 486DX/SX / / DX2/SL/DX4 family, and the Pentium 3 family. 8086/8088, and X 86 the creation of Intel's position as the leading microprocessor manufacturers. Intel (INTEL) X86.html80X86 series of processors (PROCESSOR) and Advanced Micro Devices (AMD), a new swisu (CYRIX), IBM, IDT and other manufacturers compatible (CLONE) products, known as, including: 4004: 1971 launch first 4-bit (BIT) microprocessor (MICROPROCESSOR), also included another three-chip (CHIP): 4001 (RAM), 4002 (ROM), 4004 (REGISTER) .8008: 1972 launch, 8-bit Processor .8080: 1974 release, 8-bit processors, the use of silicon technology to produce, including memory (MEMORY), processing speed of two times for 4004. the world's first microcomputer (MICROCOMPUTER), MITS use of ALTAIR 8080 processor. BILL GATES and PAUL ALLEN 2 Microsoft (MICROSOFT), founder of 8080 human development BASIC compiler (COMPILER) .8085: 1976 launch, and 8080 with chip (CHIP), 8086: 1978 introduced 16-bit processors, for the X86 series of ancestor, 0.5 MIPS, the operation frequency of 5 - 10 MHZ. 8088: 1979 introduction of the 8086 using the 8-bit bus architecture 16-bit processor, 0.5 MIPS, the operation frequency of 5 - 8 MHZ, the use of costs were lower than 8086, for IBM adopted as the IBM PC's CPU .8087: launched in 1980, and 8086 with a 16-bit floating point (FLOAT-POINT) computing coprocessor (COPROCESSOR) .80186: 1982 launch, 16-bit highly integrated processor, operating frequency of 6 MHZ, is often used as a device controlling .80188: 1982 introduced 16-bit 80186 architecture, 8-bit bus, operating frequency of 6 MHZ.80286: 1982 launch, 16-bit, 1.5 MIPS, the operation frequency of 8 - 12 MHZ, support for virtual memory (VIRTUAL MEMORY), can be 16 MB addressable memory (MEMORY) .80386 DX: 1985 launch, 32-bit, 10 MIPS, the operation of Frequency 16 - 33 MHZ, RAM 4 GB addressable .80387: 80386 with 32-bit floating-point coprocessor .80386 SX: 1988 launch, 32-bit 386 architecture, 16-bit bus, 2.5 MIPS, the operation of Frequency 16 - 33 MHZ, can use the 80286 chipset (CHIPSET) and the motherboard (MOTHERBOARD). 80486DX: 1989 launch, 30 MIPS, the operation frequency of 25 - 50 MHZ, built-in cache memory (CACHE) and floating-point computing processors, the use of PIPELINING technology .80386 SL: 1990 launch, power management version of the 386, 5 MIPS, operating frequency of 20 - 25 MHZ, typically used in portable computers .80486 SX: 1991 launch, 20 MIPS, the operation frequency of 16 -- 33 MHZ, no floating point processor .80486 SL: 1992 launch, power management version of the 486, 20 MIPS, the operation frequency of 20 - 33 MHZ, typically used in portable computers .486 DX2: 1992 launch, double in frequency, 50 MIPS, the operation frequency of 50 - 66, there is an updated version of OVERDRIVE called .486 DX4: 1994 was launched three times in the frequency, 70 MIPS, the operation frequency of 75 - 100, there is an updated version of OVERDRIVE called. PENTIUM: 1993 launch , 32-bit, 125 MIPS, 64-bit bus, operating frequency of 60 - 200 MHZ, the use of SUPERSCALING technologies, known as the OVERDRIVE upgrade version, launched in 1997 with MMX capabilities versions. PENTIUM PRO: 1995 launch, operation frequency 150 - 200 MHZ, built-in 256/512 KB L2 memory cache (MEMORY CACHE), implementation of the 16 BIT program PENTIUM worse than performance. PENTIUM II: 1997 launch, operation frequency of 233 - 450 MHZ, 32 KB L1 memory, fast take, and basically use the PENTIUM PRO structure to enhance 16-bit program execution efficiency, built-in MMX capabilities, using SEC packaging, SLOT 1 slot. CELERON: PENTIUM II structure, operation frequency of 266 - 333 MHZ, cancel L2 CACHE (COVINGTON) , then add back 128/256 KB (MENDOCINO), and with the CPU clock runs at the same time. PENTIUM II XEON: PENTIUM II structure, operation frequency of 400 - 450 MHZ, 100 MHZ FSB, SLOT 2 slot, 512KB/2MB L2 CACHE At the same time with the CPU clock is running. AMD K6: with PENTIUM-compatible processors. AMD K6-2: approximately equivalent to PENTIUM II, containing as 3DNOW! strengthening of MMX instruction set. CYRIX MII: approximately equivalent to PENTIUM II.

XBASE Programming
DBASE-compatible software with the generic term.