As with other programs, you tend to draw in 2D or 3D model space and prepare drawings for printing in a 2D paper space. Blocks, symbols, groups TurboCAD has an unusually flexible way of handling symbols. As with almost all CAD software, TurboCAD saves symbols in libraries. But TurboCAD can also read entire drawings or sections of drawings including AutoCAD drawings as symbols. Just store them in a folder that you designate as one that holds symbols.
Blocks can reside inside groups and vice versa.
In fact, a group can contain multiple subgroups and blocks with subblocks. Each new use of a block simply references the copy in the library. So repetitive use of a group can vastly increase drawing size. Blocks are available only to the drawing that has a library containing them. Symbols are available to all drawings.