1. PLCs were originally designed as replacements for: a) microcomputers. c) analog controllers. b) relay control panels. d) digital controllers.

PLCs (Programmable logic controller) were original designed as replacement for relay control panels.  Relay is another word for a switch. Relay control panels were made for the control of electronic instrumentents or devices. Later on PLCs were made to replace these timers and relay control panels. PLCs are more reliable, flexible and can work better in the harsh environmental situations then the relay control panels.

All the Microsoft Office products should definitely be as large a part of our work today as they are.

There are other products that can substitute these but not all of the Microsoft Office products. Excel is has become an major part of the organizations which deals with business across the world. All finance related events are configured in excel sheets to represent data in a required format for clarity.

Analysis of stock markets, budgets, sales, productions, schedules, expenditure can be done through Excel. Small businesses benefit extremely with Microsoft Products.