All For the Team

I’m confused about Teams. I saw a sign on a business office door calling themselves an office rental team. I see more and more business trams touting. I thought the word teams were reserve for things like softball teams or other sporting groups competing. Also, I suppose being on a team elevates your ego being part of something bigger and better. Like you never heard of a checker player call himself or herself a team. And where does a mule Team fit in?