AutoCAD 2000:

AAD, *DBCONNECT
AEX, *DBCONNECT
ALI, *DBCONNECT
ASQ, *DBCONNECT
ARO, *DBCONNECT
ASE, *DBCONNECT
DDATTDEF, *ATTDEF
DDATTEXT, *ATTEXT
DDCHPROP, *PROPERTIES
DDCOLOR, *COLOR
DDLMODES, *LAYER
DDLTYPE, *LINETYPE
DDMODIFY, *PROPERTIES
DDOSNAP, *OSNAP
DDUCS, *UCS