Bar graph arrays are light emitting diodes (LEDs) that are used for solid state metering in applications such as audio monitoring, telecommunications, and instrumentation

Digital bargraphs measure process and electrical variables such as pressure, flow, temperature, speed, current, and voltage.

Metal rod and bar stock are metals and alloys in the form of round bars or rod, square bars, rectangular or flat bars, hexagons, and other bar stock shapes

Fixed mount bar code scanners are designed to manually or mechanically read items passed by their scan windows.

Hand held bar code scanners are used typically as inventory or point of sale (POS) devices.

Bar code scanners are designed to read imprinted bar / matrix code symbologies.

Diode arrays are composed of multiple discrete (usually unconnected) diodes on a single silicon chip.