NEMA, the National Electrical Manufacturers Association, Rosslyn, Va., recently released ICS 19-2002, Industrial Controls and Systems: Diagrams, Device Designations, and Symbols.

The ISA5.1 subcommittee's latest publications are: ANSI/ISA-5.1-2024, Instrumentation and Control – Symbols and Identification ISA-TR5.1.02-2024, Instrumentation and Control – Identification System ...

Flowchart diagrams include count, compare, macro, increments, and expressions. Microcontrollers (PICs) are used in control systems, and require amplification.