ISO 80000 Part 13 gives some symbols within the scope of communication technology (its scope is more narrow than its title would suggest). The standard itself

ISO 80000 Part 13 gives some symbols within the scope of communication technology (its scope is more narrow than its title would suggest). The standard itself is copyrighted but the quantity symbols are listed on Wikipedia, https://en.wikipedia.org/wiki/ISO/IEC_80000#Part_13:_Information_science_and_technology https://en.wikipedia.org/wiki/ISO/IEC_80000#Part_13:_Informa... See also https://www.nist.gov/publications/quantities-and-units-software-product-measurements https://www.nist.gov/publications/quantities-and-units-softw...