Sending emails via plane in the jungle

I was chatting with one of my dad's friends recently who was telling me about how they sometimes used to send emails back in the 1990's when they were in Papua New Guinea working as missionaries. I thought it was worth sharing!

"The phone lines were down for several weeks/months so we needed to transfer the emails from Port Moresby [the capital city where the only Internet pipeline is/was]. That was back in the days of MO drives (magneto optical read-write drives). High tech! We had to setup an intermediary post office box which collected the messages from the US in Port Moresby airport. When the MO drive was connected it transfered messages from and to the MO drive. So that let us fly the messages back and forth from Port Moresby airport to Ukarumpa [the village in the Eastern Highlands Province where the missionaries were based]. One morning, at about 4:30, I got a call because the pilot who was to pickup the disk could not get the procedure to work. It ended up being that someone (not me) had changed the password. Those were the days."