Data input , Basic Computer Science

Assignment Help:

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.


Related Discussions:- Data input

Open source software, Open Source Software: Open Source Software (OSS)...

Open Source Software: Open Source Software (OSS) is software that comes with source code, and importantly also provides rights (typically reserved for copyright holders) to st

Operating system problems, 1. In discussing software algorithms for mutual ...

1. In discussing software algorithms for mutual exclusion, we noted that optimizing compilers and out-of-order execution by processors could invalidate most of these algorithms bec

Formulate linear programming problem, Question (a) A firm produces four...

Question (a) A firm produces four products: P , Q , R , and S . Each unit of product P requires two hours of milling, one hour of assembly, and $10 worth of in-process in

Convert string to super ascii, A string S is said to be "Super ASCII", if i...

A string S is said to be "Super ASCII", if it contains the character frequency equal to their ascii values. String will contain only lower case alphabets (''''''''a''''''''-'''''''

Optical disk storage and cd - rom, Optical disk storage and cd - ROM: ...

Optical disk storage and cd - ROM: Optical disk storage is relatively new alternative to magnetic storage. Digital data is burnt into the surface of a plastic disk coated with

Stub cables, Stub cables: The stub cables are for bi-directional data m...

Stub cables: The stub cables are for bi-directional data movement between LRU and current mode coupler.  The stub cables also supply power from the LRUs to the current couplers

Search in problem solving-artificial intelligence, Search in Problem Solvin...

Search in Problem Solving: If Artificial intelligence I may inform the other sciences about anything, it is about problem solving and, in specific, how to find solutions to pro

Paid Website Usability Testers, Assess the reliability of data gathered via...

Assess the reliability of data gathered via paid Internet users. Describe and assess the evaluation method being used by the testing company, i.e., nonvisual and verbal recording o

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd