Professional Terms

passages

摘要：文章训练

Vocabularies

Combination

electromechanic

Intelligence

Term

Passages

The term computer is used to describe a device made up of a combination of electronic and electrom mechanical components.

By itself, a computer has no intelligence and referred to as hardware.

A computer doesn't come to life until it is connected to other parts of a computer system.

When one computer system is set up to communicate with another computer system.

Connectivity becomes a sixth system element.

In other words, the manner in which the various individual systems are connected...

For example, by phone lines. Microwave transmission, or satellite---is itself an element of the total computer system.

Notes

In other words, the manner in which the various individual systems are connected

For example, by phone lines, microwave transmission, or satellite---is itself an element of the total computer system.

This is the lab in which we often make scientific experiment.

Professional Terms

passages

摘要：文章训练

Vocabularies

constitute

create

however

instruction

operate

perform

present

response

task

Passages

Software is the term used to describe the instructions that tell the hardware how to perform a task.

Without software instructions, the hardware doesn't know what to do.

People ,however ,consititute the most important component of the computer system.

Operate the computer hardware.

they create the computer software instructions and respond to the procedures that those instructions present.

Right now let's discuss the importance of data and information .

Notes

Software is the term used to describe the instructions that tell the hardware how to perform a task; without software instructions ,the hardware doesn't know what to do.

The purpose of a computer system is to convert data into information.

Data is raw, unevaluated facts and figures, concepts ,and instructions.

This raw material is processed into useful information.

In other words, information is the product of data processing.

This processing includes refining ,summarizing categorizing ,and otherwise manipulating the data into a useful form for decision -making.

For example, the facts and figures contained in a stack of customer orders waiting to be entered into a computer-based order entry system are data.

after the data is entered and processed,and output report about how that data affected product inventory would be information.

Notes

摘要：文章训练

Notes

This process includes refining, summarizing ,categorizing ,and otherwise manipulating the data into a useful form of decision-making.

People capture data in a variety of ways--for example by reading ,listening .or seeing.

Then they may record the data on a document.

For instance , Roger Shu records his name on an employee timecard by first entering the letter R>

This letter ,and each of the remaining letters in his name is an element of data.

as are the number 12/22 and 5,used to indicate the data and the number of overtime hours worked.

By themselves ,these data elements are useless.

we must process them to make them mean something.

The report produced when Roger's data is run through a computer-based employee records system gives us information.

for example, the amount of money due to Roger for his overtime work.

As are the number 12/22 and 5.

Mechanical Beginnings

Some mechanical control and computing devices preceded the development of the modern computer.

An American named Herman Hollerith invented machines using punch cards (穿孔卡片)that were used to tabulate statistics for the 1890 US census.

Punched cards (also marked cards) are still in limited use gathering input data for computers. You may recall the debacle in Florida during the 2000 presidential election where improperly-punched voting cards caused problems with the vote counting.[1]