Abstract: A multicolored indicator part and cover part are attached to a truck brake slack adjuster and S cam shaft. Relative motion of the brake slack adjuster and the S cam shaft causes relative motion of the two parts to reveal the colors on the indicator part. Good, warning, and danger colors are provided in highly reflective surfaces seen in a walk around inspection of a truck.

Abstract: A modular communications, command, and control system with plug-and-play connectivity, utilizing configurable independent base stations and portable handsets that preferably have similar components and functionality so as to be interoperable. The system utilizes an open system interconnection architecture preferably having fully integrated layers permitting inter-operability with adaptive applications and inter/intra-linking with external appliances and/or apparatuses. Optionally, the system may be utilized to perform extended information handling/processing, networking, personal assistance, industrial, commercial, medical, military, and/or security functions.