But there also was a startling omission: The calculator’s “C” button—the one that clears input—was gone. The “C” itself had ...

Since no one is likely to build an arcade cabinet version of a TI-89, all of these retro calculators are instead emulated entirely within a browser. This includes working buttons and functions on ...

It does this by grouping things in submenus behind buttons, allowing the interface to look clean while still retaining over 100 calculator buttons. For example, if you press and hold on degrees ...