Notes concerning “Calculators”
drag-and-drop calculator for touch devices
2015-09-03 (743 words)
Solar-powered portable computers
2016-09-17 (updated 2018-10-28) (2254 words)
Usability of scientific calculators
2016-09-29 (2867 words)
Relational modeling
2017-05-17 (updated 2017-06-01) (980 words)
Interactive calculator
2018-04-26 (2422 words)
Ideas to pursue
2018-05-05 (updated 2018-08-16) (979 words)