CPU: Central processing unit, also known as CPU or microprocessor, is called the heart of computer.
RAM: random access memory, that is, people often say "memory".
ROM: read-only memory, read-only memory.
Expand data output, expand data output. With the improvement of CPU processing speed, the data transmission speed of DRAM is also required to be improved accordingly. Generally speaking, the data transmission speed of FPM (Fast Page Mode) DRAM is 60-70 ns, while the data transmission speed of Edo DRAM is three times faster than FPM, reaching 20ns. At present, SDRAM (synchronous DRAM memory) is the fastest, and its access speed is as high as 10ns.
SDRAM: Synchronous dynamic random access memory, synchronous dynamic random access memory, also called synchronous DRAM, is a new generation of dynamic memory. It can use the same clock as the CPU bus, so SDRAM memory can greatly improve the performance of the computer compared with EDO memory.
Cache: It means "cellar" in English. Store grain, equipment, etc. ); Artifact office. " Computer is a kind of cache memory, which is located between CPU and main memory DRAM (Dynamic Random Access Memory). It is a small and high-speed memory, usually composed of SRAM (Static Random Access Memory).
CMOS: the abbreviation of complementary metal oxide semiconductor, which means complementary metal oxide semiconductor (referred to as complementary metal oxide semiconductor memory). CMOS is a battery-powered memory (RAM) used by most computers at present. It is an important tool to determine the hardware configuration of the system, optimize the overall performance of the microcomputer and maintain the system. It saves some information about system hardware settings, which will continue to exist after shutdown (this is completely different from RAM). When the computer is turned on, it needs this information to start the system. If the information retained in CMOS is confused carelessly or accidentally, the computer system will not start normally.
PCI: Peripheral component interconnection, local bus (bus is a high-speed channel used by computers to transmit information from one device to another). PCI bus is an advanced bus structure at present, and its function has been greatly improved compared with other buses. It can support burst read and write operations, and the transmission rate can reach 132Mbps. It is one of the fastest data transmission buses, and can support multiple groups of peripheral devices at the same time. PCI is not limited by CPU processor and can be compatible with existing buses. The motherboard has a small slot and low cost, which is beneficial to popularization.
Seagate: American Seagate hard disk manufacturer. Seagate means "the gateway to the sea" in English, and also often refers to the canal leading to the sea.
Quantum: English means "quantity, total amount". American quantum company hard disk trademark.
Maituo: "Crystal", American Maituo Hard Disk Company.
Ld: Laser disc, laser video disc, also known as laser video disc.
Cd: compact disc, compact disc, also called compact disc.
CD: CD-ROM, CD-ROM (memory), also known as "CD-ROM".
VCD: video disc, video disc, also known as "mini DVD".
DVD: Up to now, many people regard DVD as the abbreviation of digital video disc. In fact, since Sony/Philips and Toshiba/time warner Inc. reached a unified standard for DVD in September 1995, the connotation of DVD has changed greatly, becoming the English abbreviation of digital versatile disc. Universal "universal" means the diversification of DVD uses, which can be used not only for film and television entertainment, but also for multimedia computers and other fields. At present, it can be divided into five types according to the purpose: 1, DVD-ROM； for computer; 2. home audio-visual CD-DVD- movie; 3.DVD audio; Used for music appreciation; 4. Write CD-ROM-DVD-R once; 5.DVD-RAM, a CD that can be read and written many times.
Modem: Modem is an essential tool for home computers to surf the Internet, which can't be found in general English-Chinese dictionaries. It is the abbreviation of modulator and demodulator. Modem is an indispensable external device to realize computer communication. Because the data of a computer is a digital signal, it is necessary to convert the digital signal into an analog signal (modulation signal) suitable for transmission, so as to transmit it to another computer or other terminal (such as teletypewriter) in a long distance through a transmission line (such as a telephone line). At the receiving end, it is necessary to restore the received analog signal to the original digital signal, which requires the use of a modem.
UPS: abbreviation for uninterruptible power supply. It appears with the birth of computer, and it is one of the important peripheral devices of computer. UPS is a constant voltage and constant frequency uninterruptible power supply with energy storage devices and inverters as the main components, which is used to protect the computer from losing important data in case of sudden power failure.
TFT: Active matrix color display, referred to as TFT display, is specially used for notebook computers. TFT display screen has the advantages of fast refresh speed, bright color and bright brightness. In addition, it also has the necessary characteristics of "green computer" such as no flicker, no radiation and no static electricity.