Input/ Output (I/O) of data refers to the type of interface used to enter data and extract data. Data is entered into a system as instructions that are then processed. Data is also entered into the system to further refine and convert it. While large volumes of data are usually done by using EDI (Electronic Data Exchange), smaller volumes or irregularly formatted data can be entered manually. When automated systems are used, certain specific file formats, that can be read by the IT systems need to be used. Some such file formats are comma-separated value (csv) and others. This paper provides information on the I/O methods used for different applications.
Accuracy of data input is important. Method of data input which is the best for each of the following situations
Convenience and quality of output are important. Method of output that would be best for each of the following situations
The difference between primary storage and secondary storage
Primary storage is the area of the computer inbuilt memory that is used to store frequently accessed information. This comes into two types: RAM and ROM. RAM or random access memory is volatile and the information is lost when the computer is switched off. ROM or Read Only Memory is non volatile and used in booting the machine but it is again expensive and not easily edited. EPROM are other types of primary storage devices. Secondary storage devices are hard disks, Flash disks, tapes, floppies, etc. and these are used to store data permanently. They are read/ write and can be made integral with the computer or used externally (Stair 2001).
Different types of storage devices are optimal for different situations
References
Stair Ralph M., Reynolds George W., (23 April 23, 2001) Fundamentals of Information Systems, Course Technology Publisher, ISBN-13: 9780619034160.