What is a CaBi bike?

Excuse me, could you please explain what a CaBi bike is? I've heard the term before but I'm not entirely sure what it stands for or how it functions within the realm of transportation and urban mobility. Are these bikes specifically designed for a certain type of use or are they just regular bicycles with a special name attached? Additionally, are they available for public use and if so, how does one access them? I'm quite curious about this concept and would appreciate any clarification you could provide.