Operating System (OS)
User-Friendly Systems are:

None of these
common among traditional mainframe operating systems
becoming more common
required for object-oriented programming
easy to develop

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Operating System (OS)
Uniform Symbols Table

None of these
a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure
consists of a full or partial list of the token's as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation
a permanent table which lists all key words and special symbols of the language in symbolic form
contains all constants in the program

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