He’s been looking into different interface options with the GPIO header and just posted a guide to using an HD44780 character display with the RPi.

Also the original serial of the Raspberry Pi is 3.3V Compatible so we have Voltage Level Converter on the HAT which Converts it into 5V and also there is an TTL to RS232 Level Converter With DB9 ...

The software for “Iridis-Pi”—named after Southampton’s Iridis supercomputer—uses a free implementation of the Message Passing Interface and code written in Python to distribute parallel ...