Learning Techniques

Major System

Notations used across different domains.

Notation	Domain	Description	Example
E.123 Notation	Telecommunications	Standardized format for writing phone numbers.	+1 234 567 8900
Backus-Naur Form (BNF)	Computer Science	Describes the syntax of programming languages and context-free grammars.	`<digit> ::= “0”
Extended Backus-Naur Form (EBNF)	Computer Science	An extension of BNF with additional notation for ease of expression.	`digit = “0”
Syntax Diagrams	Computer Science	Graphical representation of the syntax rules of a language.	Diagram showing parsing flow
Regular Expressions (Regex)	Computer Science	Defines search patterns for string matching.	\d{3}-\d{2}-\d{4}
Abstract Syntax Trees (AST)	Computer Science	Tree representation of the abstract syntactic structure of source code.	(add (number 1) (multiply (number 2) (number 3)))
Prefix, Infix, Postfix Notation	Mathematics/CS	Different ways to write arithmetic expressions.	Prefix: + 2 3, Infix: 2 + 3, Postfix: 2 3 +
Set-Builder Notation	Mathematics	Defines sets by specifying a property that its members must satisfy.	{ x \mid x > 0 }
Interval Notation	Mathematics	Represents intervals on the real number line.	[1, 5)
Chemical Notation	Chemistry	Represents chemical elements and compounds.	H₂O
Musical Notation	Music	System of writing music to indicate pitch and rhythm.	Treble Clef, Time Signature: 4/4
Domain-Specific Languages (DSL)	Software Engineering	Specialized languages for specific application domains.	SQL: SELECT * FROM users WHERE age > 30;
Unified Modeling Language (UML)	Software Engineering	Standardized modeling language to visualize system design.	Class diagrams, sequence diagrams
Chemical Structure Notation	Chemistry	Represents the structure of chemical compounds.	Lewis Structure of methane (CH₄)