Perspecta Software was a start-up company founded in 1992 by
[John Ousterhout] and [Larry Rowe]. Its first, and only, product
was ''Perspecta Presents!'', software for Unix workstations to
create and display presentations. (Think PowerPoint!)

The product was Tcl/Tk-based, even though the canvas widget
had not been released at the time.  A similar widget to the
canvas, called a ''spot'' widget, was embedded in the executable.