LaserCard Optical Memory Card
Drexler Technology Corporation
||Stamped in yellow on back
overall: 1/8 in x 3 3/8 in x 2 1/8 in
According to the description on the back, this "card holds about 3 megabytes of text and software, or over 4 megabytes of digitized graphics, voice, and images".
Courtesy of the Museum of American Heritage