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Exciting changes in HF radio transmissions is the combination of the so called "Digital Modes"
Combines the processing power of modern pc's with worldwide communication capabilities
Has enabled very low powered, simple antenna construct world wide data conversations. These are mainly text, but can to some degree be transfer of binary information such as files.
The sfotware interfaces are stuck in the 'old way' of doing things
Store/Forward of messages
Chatroom view modes
Other developments such as Software Defined Radios allow for completely new interfaces and GUI ideas
Miniaturized computers (Raspberry Pi) may also allow for smaller self contained tranceivers and devices.