“Bushmail is worldwide Email that works via HF Radio anywhere in Africa. It allows 100-KB Excel and Word attachments and is powered by just a 12-Volt battery, with an antenna that can be suspended from a tree. It requires an HF Radio, HF Modem and an antenna, which can all be installed on an easy Do-It-Yourself basis. Bushmail can also be used in a vehicle, with a Laptop PC being powered and charged from the cigarette lighter plug. It is extremely robust and even works during cyclones and with baboons swinging from the antenna. Bushmail does not allow browsing the Internet, as it is purely just a highly economical Email system. The HF Radio does allow Voice communication as well.” [via] Link.