The 4014 joined the line in 1974 at $8,450 ($ in ), introducing a larger 19-inch screen as well as a more an ergonomic layout. It had a wide range of new features as well, which made it much more effective in many contexts and became especially common in computer-aided design (CAD) use. The upgrades are so widespread that the 4014 series is sometimes considered to be a separate line from the 4010, or alternately the canonical model for the entire family. The 4015 was a 4014 with the APL card from the 4013. The 4016, introduced in 1979, was a version with a 25-inch screen and a somewhat different mechanical layout to provide room for the much larger tube. It was much more expensive, with the base model selling for $19,500 in 1980 ($ in ).