Transmission Of Digital Information, E.g. Telegraphic Communication
H04M
Telephonic Communication
G06F
Electric Digital Data Processing
G06Q
Data Processing Systems Or Methods, Specially Adapted For Administrative, Commercial, Financial, Managerial, Supervisory Or Forecasting Purposes; Systems Or Methods Specially Adapted For Administrative, Commercial, Financial, Managerial, Supervisory Or Forecasting Purposes, Not Otherwise Provided For
