ADOT started using an Intergraph CADD system in 1986. The original system consisted of two VAX 785's and 24 68000 Interview workstations.

About 1991 we started to migrate to the client/server environment. The remaining VAX and the last two 68000 Intermap workstations were retired the first week of July, 1995.

In 1998 the CADD system underwent a system refresh. Windows NT 4.0 became the standard operating system for the CADD system.

In 2005, in conjunction with a PC refresh, Windows 2000 Professional became the standard operating system for the CADD system.

ADOT's CADD system currently consists of the following:

• HP workstations and pc's; HP servers; Xerox, HP and OCE plotters all networked via Ethernet area network using windows XP operating system