This chapter describes VTAM® application programming for sessions that use LU type 0 protocols. Other 3270 protocols (for example, for LU types 1, 2, and 3) are not described here; refer to the 3270 manuals for these protocol descriptions.

Before using the information in this chapter, you should be familiar with the 3270 system in the IBM® 3270 Information Display System Description and Programmer's Guide applicable to your control unit. Some of the SNA protocols mentioned (for example, brackets) are further described in Communicating with logical units.