Changes

Each element, a through m, was originally intended to be a single [https://en.wikipedia.org/wiki/Decimal/ decimal digit]. As inventories grew in complexity, element g became [https://en.wikipedia.org/wiki/Alphanumeric/ alphanumeric], beginning with capital A for certain newly added items. By 2000, uppercase C was in use.

Each element, a through m, was originally intended to be a single [https://en.wikipedia.org/wiki/Decimal/ decimal digit]. As inventories grew in complexity, element g became [https://en.wikipedia.org/wiki/Alphanumeric/ alphanumeric], beginning with capital A for certain newly added items. By 2000, uppercase C was in use.

<font +1>'''Federal Supply Classification Group (FSCG)'''</font>

<span style="font-size:110%;">'''Federal Supply Classification Group (FSCG)'''</span>

The initial subgroup, abcd, is the Federal Supply Classification Group (FSCG) [2] or National Supply Classification Group (NSCG). In theory, similar items would always have closely related numbers in this section of the NSN, no matter how the section is referred to. As the number of items has steadily increased and the system has become more complicated, it has not always been possible to keep similarity in numbers when the items are similar.

The initial subgroup, abcd, is the Federal Supply Classification Group (FSCG) [2] or National Supply Classification Group (NSCG). In theory, similar items would always have closely related numbers in this section of the NSN, no matter how the section is referred to. As the number of items has steadily increased and the system has become more complicated, it has not always been possible to keep similarity in numbers when the items are similar.