The products have codes attached for management purposes.
In this table, parts are distinguished by codes such as A1 and B2.
mathematical sign; positive or negative sign
Mathematical use for the sign of a number or expression, especially plus or minus.
A negative number is given a minus sign.
I got the sign wrong partway through the calculation.
We attached an identifying code to each part.
For this calculation, you need to invert the sign.
Chemical elements are represented by specific symbols.
As a result of the calculation, the sign became negative.
encoding; coding