# PKSER System Variable [GstarCAD 2020](Help%20System/GSTARCAD/2020/Index.md) → [System Variables](Help%20System/GSTARCAD/2020/System%20Variables/(System%20Variables).md) → [P](Help%20System/GSTARCAD/2020/System%20Variables/P/(P).md) ## Function Description: The PKSER system variable is used to control product identification code. (Read-Only) | | | | --- | --- | | Type | Strings | | Saved in | Registry | | Initial value | "" | --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/P/PKSER%20System%20Variable.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/P/PKSER%20System%20Variable.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/System%20Variables/P/PKSER%20System%20Variable.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/P/PKSER%20System%20Variable.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/P/PKSER%20System%20Variable.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/P/PKSER%20System%20Variable.md)