Computerized record storage and retrieval reduces the time necessary to enter, maintain, and analyze the records for a business. Inventory, Customers, Vendors, Sales, Purchases, Project Plans, Bills of Materials, Scheduling, etc. - All of these components can be entered into a single database, and used to maintain a business' operations. This can contribute to more streamlined operations, fewer data-entry errors, less time spent finding and more time using your business' data to help make more informed decisions.
If you're interested in adding a computerized accounting package to your business, find someone knowledgeable about such systems, and discuss your business with them. They will be able to recommend a system that is appropriate for your operation.
Systems range from under $100 to over $100,000, so make sure you know what you want and how it will help you before you begin investing money.