Lean Startup Circle is a community of entrepreneurs who are interested in lean startup methodology.
Lean startup is a term coined by Eric Ries based on lean manufacturing which applies lean thinking to entrepreneurship in general. http://theleanstartup.com/
Basically it's a group of (mostly tech) entrepreneurs starting businesses who help each other out.
An abstract shape or symbol is used to convey the values of your business.
Letters/initials from your business name are used to create a logo.
Organization name enveloped by a pictorial element or shape.