In the 1940s, curved glass appeared and the pattern business declined. NAGS continued to assign Part Numbers to catalog curved and flat glass and published the 'NAGS Catalog.' NAGS also published a chart to 'calculate' the price of flat glass.

In the 1950s, manufacturers were in conflict over their published list prices. As a neutral party, NAGS was asked to assign list prices to NAGS part numbers, establishing the NAGS List Price. These list prices reflected the industry practice of discounting and were based on manufacturers' truckload prices. NAGS started publishing the part numbers with prices, establishing the 'NAGS Calculator'.

Through the 1980s, NAGS information was available exclusively in print form. There was little change in the industry business practices. In the late 1980s, change started happening quickly as advances in technology produced more curved, tinted and coated parts. Networks began operations and electronic commerce was introduced to the industry.

In 1991, NAGS joined the global information marketplace through its acquisition by Thomson International, a world-wide publishing and information services company, and began development of the GlassMate® Database. Today, this database is used in many ways in support of the Auto Replacement Glass industry; e.g., part identification, inventory management, purchasing, invoicing/billing, EDI, auditing, etc. The vehicle configurations in the database have been adopted as Code Source #474 by the X12 Accredited Standards Committee of the American National Standards Institute.