Here we would like to draw your attention to OVAB transaction code in SAP. As we know it is being used in the SAP SD-SLS (Sales in SD) component which is coming under SD module (Sales & Distribution).OVAB is a transaction code used for /nse38/Schedule Line Types in SAP.
It comes under the package VA0C.
Transaction OVAB technical data table
|Purpose||/nse38/Schedule Line Types|