DataTAC is a wireless data network technology originally developed by Motorola and deployed in the United States as the ARDIS network. DataTAC was also marketed in the mid-1990s as MobileData by Telecom Australia, and is still used by Bell Mobility as a paging network in Canada. The first public open and mobile data network using MDI DataTac was found in Hong Kong as Hutchison Mobile Data Limited (a subsidiary of Hutchison Telecom) where public end-to-end data services are provided for enterprises, Fedex, and consumer mobile information services were also offered called MobileQuotes with financial information, news, telebetting and stock data.

DataTac is an open standard for point to point wireless data communications, similar to Mobitex. Like Mobitex, it is mainly used in vertical market applications. One of the early DataTac devices was the Newton Messaging Card, a two-way pager connected to a PC card using the DataTac network. The original BlackBerry devices, the RIM 850 and 857 also used the DataTac network.