Assembler: An assembler is a type of computer program that interprets software programs written in assembly language into machine language, code and instructions that can be executed by a computer. Compiler: A compiler is a computer program (or a set of programs) that transforms source code written in a programming language (the source language) into another computer language (the target language), with the latter often having a binary form known as object code Preprocessor: The C Preprocessor is not a part of the compiler, but is a separate step in the compilation process. In simple terms, a C Preprocessor is just a text substitution tool and it instructs the compiler to do required pre-processing before the actual compilation. We'll refer to the C Preprocessor as CPP. Laxical Analysis: Lexical analysis is the first phase of a compiler. It takes the modified source code from language preprocessors that are written in the form of sentences. The lexical analyzer breaks these syntaxes into a series of tokens, by removing any whitespace or comments in the source code. Parsing: Parsing or syntactic analysis is the process of analysing a string of symbols, either in natural language or in computer languages

Application of C Programming are : C language is used for creating computer applications Used in writing Embedded softwares Firmware for various electronics, industrial and communications products which use micro-controllers. It is also used in developing verification software, test code, simulators etc. for various applications and hardware products. For Creating Compiles of different Languages which can take input from other language and convert it into lower level machine dependent language. C is used to implement different Operating System Operations. UNIX kernel is completely developed in C Language. Advantages of C-language: 1.C is compiler based language rather than interpreted based. 2. C is portable language 3. C is the Collection of lot of library files 4.C language is easy to learn for beginners. 5. C language support good graphics. 6.C language support system programming 7.C language support number of operators 8. C language support strong handling 9.C is one of a large number of high-level languages designed for general-purpose programming,