As your business matures to the point that you have begun to develop systems, processes and methodologies, your business will need to decide on tools to manage these processes and enforce the best practices.
For example, my business is a professional services company, so the following are key processes for us: performing estimation, authoring proposals, tracking time, invoicing for time. This is effectively the "Operations" of our business, and therefore the software that supports these operations could be referred to as "line of business" software.
If your business has any data associated with its operations (yes, this means 100 percent of you), you need line of business software. This software will, over time, accumulate the data that you will study and analyze to learn about your company's effectiveness as well as to identify shortcomings and opportunities for improvement.
For example, in my business, I might like to know the following:

















