Define the following and draw their symbols:

(a) Process Box

(b) Terminal Box

(c) Input/Output Box

(d) Decision Box

(a) Process Box

A process box is used to represent all types of mathematical operations and assignment of values. It is rectangular in shape. Thus, arithmetic operations like addition, subtraction, multiplication and division can be shown in this box.

(b) Terminal Box

This box is used to indicate the beginning (START) and the end (STOP) of a process. It is an oval or a rounded rectangle. A terminal box with the word 'START' is used at the beginning of the flowchart and a box with the word 'STOP' is used at the end of the flowchart.

(c) Input/Output Box

These boxes are used to represent the input/output operations of a process. The I/O box is represented by a parallelogram. All the commands required to be taken or given are put into these boxes. Thus, statements like INPUT, PRINT etc., are used in these boxes.

(d) Decision Box

The decision box is used to represent the statements which can either result in a True/False (Yes/No) condition. It is in a shape of a diamond or a rhombus. If the statement results in True (Yes) then the statements following the 'true' condition are implemented, otherwise the statements following the 'false' condition are implemented.