MegaMegaTypeType
A uniwidth sans by Ralph du Carrois: every weight and italic shares the same character widths, so you can restyle text without a line ever reflowing.
About
Set's name is its idea: letters keep identical widths from the hairline Two to Black and across the italics, so whole paragraphs can change weight or style with the line breaks left exactly where they were. That makes it a natural fit for interfaces, hover states and tables. Alternate a and g and firm forms for i, l and I suit the fixed widths, and it ships with a variable font covering Latin and Vietnamese.
Classification
A sans built on a uniwidth system: every character keeps the same width across all weights and italics, so text can change weight without reflowing. Alternate a and g, and distinctive i, l and I shaped to sit well in the fixed widths.