Data input , Basic Computer Science

Data Input : There are several aspects of data input that need careful consideration. We shall assume that in a laboratory environment you are mainly concerned with entering data via a keyboard. There are other methods which, although not frequently used, you may encounter:

(1) Optical character recognition - scanners that read text from paper directly into a computer;

(2) Scanners, e.g. for reading bar code information;

(3) Paper tape systems - old equipment;

(4) Analogue-to-digital converters - reading experiment. data from photoelectric cells in, for example, spectrometers.

At first sight, entering data into a computer might not seem problematical. Indeed, the mechanics of data entry are well tried and straightforward. However, from a management point of view there are several considerations.

First of all, there is the problem of access. This is often an acute problem in educational establishments where there might be an abundant supply of computers for teaching but a desperate shortage for management and administration. Sharing a computer terminal does not really work satisfactorily, and if a computer is to be a really useful management tool, it must be on hand at all times.

Another point to consider is that of training. Whoever enters data into your system, must know what they are up to. Otherwise it will not be long before the GIGO principle is brought into play. Adequate training is the cornerstone of good computer systems.

Coupled to both access and training is the problem of the time taken to 'key in' data. Consider the case of card index system being transferred to a computer system. At some stage, every character in the card index needs to be keyed into the computer. The computer system will not be any use until the transfer is complete and it may take months of time for keying- in the data. Even then there will be a need to update the data regularly which will require more time at the keyboard. Never underestimate 'keying-in' time. Working conditions are especially important in computer work, particularly if it is for protracted periods. You cannot, for example, put a computer on someone's desk one day and expect everything to run smoothly. Operating computers can be particularly tiring and stressful and hence it is worthwhile investing in proper furniture, ensuring that lighting conditions are suitable, and that noise and heat levels are kept under review.

Posted Date: 4/19/2013 3:06:12 AM | Location : United States







Related Discussions:- Data input , Assignment Help, Ask Question on Data input , Get Answer, Expert's Help, Data input Discussions

Write discussion on Data input
Your posts are moderated
Related Questions
Metropolitan Area Networks : These type of networks generally cover specific metropolitan area and provide to them all the services.  Wide Area Networks (WANs): Wide Are

Magnetic Memory:  In the above section we have seen various types of semiconductor RAMs. These high speed semiconductor storage devices (i.e. RAMs) are expensive. So we need s

definition of file operations

Twisted Pairs: Twisted pairs are familiar to all of us as the copper wire telephone lines. These are of low frequency, and support a limited bandwidth (one voice channel) but

This web page looks at assembly languages in a common method. Specific illustrations of addressing modes and instructions from a variety of processors are used to demonstrate the g

Software: A computer system consists of two parts - hardware and software. The first part, computer hardware, refers to all the visible components of the computer system:  key

why first generation computers are better than fourth generation computers

Here are the more specific requirements and the related points - use the below as a check-off list when you make your presentation.  Please note . . . many of the requirements are

Define Levels of Abstraction in a DBMS, explain briefly, Conceptual Schema, Physical Schema, External Schema

Computer Generations: From the early 1940's to the present, computer scientists have been able to identify clear-cut stages in the development of computer technology. With eac