D & K Business Systems

So much more than office and school supplies! Find a growing product selection including cleaning and safety supplies, furniture, iPads and Apple products, technology, paper, ink, electronics, computer repair, copy & printing services, phone repair services, and water damaged phone repair services.

Monroe Systems for Business began with the introduction of the first commercial calculator in 1912. In fact, to this day, calculators are the company s only business. Monroe Systems for Business manufactures and markets a variety of calculators, including light-duty ones, medium-duty ones and heavy-duty ones. The company s heavy-duty calculators are what it is perhaps best known for, printing up to thirty percent faster than traditional calculators and lasting nearly twice as long. The company also provides national account programs, purchase agreements, ordering flexibility and service delivery to afford its customers the best value. Monroe Systems for Business was founded in 1934 and maintains its headquarters in Levittown, Pennsylvania.