Disappointment with Wiki made me Blog Wikipedia is a place of knowledge. Got disappointed when I went there I for a definition in the Glossary of Computer Hardware Terms. Noticed some definitions vague. Some confusing. Some inaccurate. Some misleading. Some wrong! As I did in the year 1988, I noticed another opportunity for me. Having authored two Computer books, one for Hardware Engineers and another for Graduate Students of Computer Science, I decided not to go back. Let me do something for School Children. Provide simple definitions for often used Basic computer terms that are useful for non-IT Professionals and laymen too. 1. BUS CONCEPT What is a BUS ? Often many persons give vague definitions. 1.0 I/O BUS in Mainframe Computers In the year 1973, I asked this question to my boss, Late Prof. J R Isaac at IIT Mumbai. He took me near the main frame computer, EC-1030, IBM System 360 compatible mainframe computer. Opened the doors of I/O Channels frame (Shelf). He defi...