1. Information is a set of marks or signs that have meaning. These consist of letters or numbers, digits or characters, typewriter signs, other kinds of signs, and so on. A computer reacts differently to different digits or characters.
2. The smallest part of information is called bit. Bits are grouped in units that are called bytes. The bytes are handled in standard groups, which are called machine words or just words.
3. The computer is told what operations to perform by means of instructions. An instruction is a command to the computer. Instructions must be given to the computer to tell it how to process the data it receives and the format needed for output and storage. The ability to follow the program sets computers apart from most tools. However, new tools ranging from typewriters to microwave ovens have embedded computers, or built-in computers. An embedded computer can accept data to use several options in its program, but the program itself cannot be changed. This makes these devices flexible and convenient but not the embedded computers itself.
4. Much of the processing computers can be divided into two general types of operation. Arithmetic operations are computations with numbers such as addition, subtraction, and other mathematic procedures. Early computers performed mostly arithmetic operations, which gave the false impression that only engineers and scientists could benefit from computers. Of equal importance is the computers ability to compare two values to determine if one is larger than, or equal to the other. This is called a logical operation. The comparison may take place between numbers, letters, sounds, or even drawings. The processing of the computer is based on the computers ability to perform logical and arithmetic operations.
5. With the advent of new computer applications and hardware, the definition of data has expanded to include many types.
6. Numeric data consists of numbers and decimal points, as well as the plus (+) and minus (-) signs. Both arithmetic operations and logical operations are performed on numeric data. This means that numbers can be used for calculations as well as sorted and compared to each other.
7. Text, or textual data, can contain any combination of letters, numbers and special characters. Sometimes textual data is known as alphanumeric data.
8. Various forms of data that we can hear and see makes up audio-visual data. The computer can produce sounds, music and even human voice. It can also accept audio information as an input. Data can also take form of drawings and video sequences.
9. Physical data is captured from the environment. For example, light, temperature and pressure are all types of physical data. In many large buildings, computer systems process several kinds of physical data to regulate operations.
10. Computers can set off security alarms, control temperature and humidity, or turn lights on and off, all in response to physical data. These applications increase people's safety and save the time and money.
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. Language.
Ex. 6 State to what part of speech each word belongs, translate them into Russian. Use the table on page 102-104.
Ability, flexible, addition, subtraction, importance, logical, comparison, textual, combination, physical, safety.
Exercise 7. Match words and word combinations in column A with those in column B.
A B
1.to compare 1.
2. logical operation 2.
3. false 3.
4. to benefit 4.
5. embedded 5.
6. advent 6.
7. decimal point 7.
8. storage 8.
9. drawing 9.
10. convenient 10.
Exercise 8. Give the definitions of the words:
1) Arithmetic operation
2) Logical operation
3) Information
4) Bit
5) Byte
Exercise 9. Make the sentences complete using the information from the text:
1) ... are computations with numbers such as addition, subtraction, and
other mathematical procedures.
2) The computers ability to compare two values to determine if one is
larger than, smaller than, or equal to the other is called a...
1) New tools ranging from typewriters to microwave ovens have
embedded computers, or... computers
2) An... can accept data to use several options in it's program, but the
program itself cannot be changed.
3)... can be used for calculations as well as sorted and compared to
each other.
4)... can contain any combination of letters, numbers and special
characters.
5) Various forms of data that we can hear and see makes up... which is
captured from the environment.
V. Comprehension.
