An IP address also known as an Internet Protocol address is a numerical name given to each device of a network. Here the devices can be a computer, printer.

The classical waterfall model is the most obvious way to develop software. Though this model is elegant but it is not a practical model in sense.

OSI model also known as Open System Interconnection is an abstract layer of framework for defining standards for linking distinct computers in a switched network.

Before I start the discussion about polish notation and reverse polish notation, we must know why we need these two ways of writing expressions.

As we find 1’s and 2’s complement of binary numbers or 7’s and 8’s complement of octal numbers using R’s and (R – 1)’s complement formulae.

A Half Adder is the most basic digital arithmetic circuit. It performs the binary addition of two-bit binary numbers.

A Full Adder is a combinational circuit that performs the Binary addition of three different or same binary input bits.