The Rocklin office employs thirty-five people in research and development, sales, manufacturing, education, marketing, and technical support.

[2] Originally established in 1987, in Rocklin, California, Parallax Inc. manufactured products such as the ISEPIC, TopRAM, and the first third-party Microchip PIC Programmer.

In 1998, Parallax Inc. formed a partnership with Ubicom (formerly Scenix Semiconductor) to develop tools and BASIC Stamps using their new SX microcontrollers.

The Propeller 2 processor includes features commonly requested by customers such as code protection, additional RAM and more input/output pins.

Parallax manufactures sensors to measure distance, color, humidity, temperature, pressure, RPMs, heat, and altitude.

These sensors are either surface-mounted components on a printed circuit board or in packages that are readily acceptable for breadboard-style mounting.

The original UPE, the Unofficial Propeller Expo North East (UPENE) was hosted by a long time Parallax Forum member, "Oldbitcollector."

He labeled it "Unofficial" so hobbyists could meet and exchange projects, ideas, and advice about Parallax robotics without getting permission to host an "Official Propeller Expo."

The expo consists of educators, engineers, hobbyists and students setting up tables and sharing their experiments, demonstrations, and products based on or inspired by microcontrollers such as the Parallax Propeller.

This UPE also offers a special educator's course hosted by Parallax's engineer and author Andy Lindsay.

Members frequently discuss projects, programming, and products designed around the BASIC Stamp and Propeller Chip.