Each VTS-TSR is a shared Data Space that may be defined to be as large as 2 GB. If additional capacity is needed, an application may refer to any number of VTS-TSRs consecutively, by changing the VTS name in the TB-PARM, or by using a suitable tableBASE Library List (LIB- LIST) with VTS name entries and/or using VTSFIRST and/or VTSLAST run time options.