Last week I shared here pictures of the MK-90, one of the coolest systems of my pocket computer collection. As promised, I shot a few basic videos so you can have a sense of its performance and use. The examples are in BASIC and are basic :-). More to come later. I do apologies for the background noise (AC) and would recommend you to mute your player while viewing the videos. There are no audio comments, so you will miss nothing. Enjoy!