A hashtable or a hash map is a data structure that is used to implement an associative array. It is user-defined reference types. It associates keys with values. The primary operation in hash table is look like: given a key (e.g. a studentâs name), find the corresponding value (e.g. that studentâs ID number).
DRTV is a type of television-based advertising that encourages viewers/consumers to call, visit a website or in some other way make a purchase, register, vote, make an appointment, request more information or take another desired action.
DVR or PVR: Personal Video Recorder or more commonly called now a DVR, digital video recorder has a computer style hard drive for digitally recording satellite television programs. There are three types of DVRS for DIRECTV. Ultimate TV is a discontinued DVR format. Ultimate TV was in part developed by Microsoft.