Wikipedia has more general information about the topic at Electronic Associates

Electronic Associates, Inc. (EAI) was a major analog computing company during the 1950s and 1960s. At one point EAI became the largest supplier of general-purpose analog computers. During the later 1960s into the 1970s they attempted to transition into hybrid computer. EAI's hybrid computers were still in wide-spread use well into the 1980s. On 07/03/1992 EAI was renamed EA industries Inc. EAI filed for bankruptcy on 06/02/1999, most of the assets were sold to a variety of other firms.

Analog computers

By the early 60s, over 70% of all precision general purpose analog computers were designed and built by EAI.

• PACE Series
• PACE 16-31R
• PACE 24A
• PACE 24D
• PACE 31R
• PACE 131
• PACE 221R
• PACE 231R
• PACE TR-5
• PACE TR-10
• PACE TR-20
• PACE TR-48

Hybrid computers

EAI called their hybrid systems HYDAC which was short for Hybrid Digital/Analog computer.

• Pacer
• Pacer 500
• Pacer 580
• Pacer 680
• Pacer 700
• 7800
• 8900
• 8800

Minicomputers

• Pacer 100