A Compiler reads a program in a Source Language and translates it in a target language 
- Compiler translates
- Linker resolves external mamory addresses
- Loader puts together object files into memory
Compiler
Analysis
Lexical analysis | Scanning
The Lexer groups character, the Lexical Analyzer outputs Tokens for each Lexem. The token are then used by the Syntax Analyzer to get information from the symbol-table
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Lexemes Meaningful groups of characters
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Tokens <token-name,attribute-value>