SNA Server provides concurrent connections to multiple IBM mainframe and compatible systems by acting as an IBM PU type 2.0 or 2.1 APPN LEN node, supporting LU types 0, 1, 2, 3, and 6.2. (Table 1.2). SNA Server offers broad API support to all popular desktop operating systems, including MS-DOS, Windows 3.x, Windows for Workgroups, Windows 95, Windows NT, OS/2, Macintosh, and UNIX.
Table 1.2 Platforms and LU Types supported by SNA Server
| Desktop Platforms | LU Types |
| MS-DOS | LU0, LU1, LU2, LU3, LU6.2 TN3720, TN3287, TN3270E |
| Windows 3.x, Windows for Workgroups |
LU0, LU1, LU2, LU3, LU6.2 TN3720, TN3287, TN3270E |
| OS/2 | LU0, LU1, LU2, LU3, LU6.2 TN3720, TN3287, TN3270E |
| Macintosh | TN3720, TN3287, TN3270E |
| UNIX | LU0, LU6.2 TN3720, TN3287, TN3270E |
| Windows 95 | LU0, LU1, LU2, LU3, LU6.2 TN3720, TN3287, TN3270E |
| Windows NT Workstation | LU0, LU1, LU2, LU3, LU6.2 TN3720, TN3287, TN3270E |