Kinda like assembly language mnemonics

NonFederal Debt relative to GDP

For me it is not easy to read the title of the above graph:

(All Sectors; Credit Market Instruments; Liability, Level-Federal Government; Credit Market Instruments; Liability, Level)/Gross Domestic Product
It is much easier for me to know that "TCMDO" is the number that measures "All Sectors; Credit Market Instruments; Liability, Level"... that "FGTCMDODNS" is the number that measures "Federal Government; Credit Market Instruments; Liability, Level"... and that "GDP" is "Gross Domestic Product"... and then to read this:

(TCMDO-FGTCMDODNS)/GDP
It's just easier.

Maybe it's me.