|
Читайте также: |
The computer is the heart of any direct digital control (DDC) system. Although there are many models of DDC computer systems currently available, most operate in the same basic way and are similar in design to personal computers.
In their simplest form, all computers consist of hardware and software. The term hardware includes all the components that a computer is assembled from the central processing unit, memory, input and output terminals, operator display terminal, keypad, and peripheral devices. Peripheral equipment is used to link the computer's internal environment to the outside world to allow humans to access stored information and to allow for machine-to-machine communications in a computer network. Software is a series of instructions that tell the computer how to operate. These instruction sets or commands are packaged together to form programmers which are designed to manipulate data for a specific purpose. There are several echelons of software used in computers, which range from programs that tell the computer how to handle basic tasks to programs that guide the computer through difficult data processing. Computers commonly use several layers of software running concurrently to guide their operation, and these layers are
transparent to the computer operator a direct digital control (DDC) system – система прямого цифрового контроля
Дата добавления: 2015-07-25; просмотров: 103 | Нарушение авторских прав
| <== предыдущая страница | | | следующая страница ==> |
| An enquiry– запрос | | | Hardware – аппаратное обеспечение |