HALOS - Home Appliance Label and Overlay System.

Starts & Stops Package Tactile Icon Description.

Start - the shape is a right pointing triangle.
Stop/Cancel - the shape is an X.

On/Off - the shape is a circle with a nub at the top.

Timer - the the shape is an hourglass, wide at the top, thin in the middle and wide at the bottom.

Clock - the shape is a circle with a cutout in the upper right. This represents a clock face with hands at 12 and 3.

website:  tangibleSurfaceResearch.com/halos