The penveu is a pen-like device developed by the American company, Interphase, for use with digital audio-visual presentations.

[citation needed] Interphase Corporation (Nasdaq: INPH) was founded in 1974, and filed for initial public offering in 1984.

The company developed and tested the concepts for two years until unveiling the product at the DEMO conference in Santa Clara, California, on April 18, 2012.

The VEU box intercepts the display to add visual targets that include information on its position encoded using a change in brightness.

A digital signal processor (DSP) in the pen calculates the position of the tip based on the information retrieved from the targets detected.