How to Build the Perfect Commercial Real Estate Technology Stack The technology stack. That’s a term we hear a lot these days. It may sound a little geeky, but it’s actually pretty simple. A tech stack is a group of multiple technology applications that today’s businesses use to manage their core functions. Decades ago, it was an actual stack of hardware in the IT department. Now, like most technology, it’s virtual and resides in the cloud. How to Build the Perfect Commercial Real Estate Technology Stack Integrated Business Systems, Inc.