In 1980, after recognizing a local need for a shipping supply distributor, Liz and Dick Uihlein started Uline from the basement of their house. Their first product, after much consideration, was the H-101 carton sizer, which is still offered today. The H-101 carton sizer sold far beyond their expectations and encouraged Liz and Dick Uihlein to add more products to the Uline catalog the following year. Uline has steadily grown since 1980 and continues to be a family owned and run business. The Uline product line has expanded to include industrial and packaging materials, including over 1,700 corrugated box sizes alone. The 848 page Uline catalog reaches many different businesses across North America, offering over 40,000 products with quick delivery. Today, with over 8,500 employees companywide, Uline has U.S. distribution centers near Chicago, Minneapolis, Allentown, Los Angeles, Atlanta, Dallas, Seattle and Reno, Canada locations in Toronto and Edmonton and Mexico locations in Mexicali and Monterrey. please summarize the following paragraph, focusing on key points and formatting.