Question: An analog board was used in which third model of the Macintosh line?
Related documents: [0]  [DOC] An analog board is a circuit board that contains the majority of analog circuitry in certain Apple Macintosh computers. The analog board was one of two circuit boards within many early Macintosh computers, including the Macintosh 128K/512K/Plus, Macintosh SE series, and Macintosh Classic series. The analog board contained several capacitors, a battery compartment, and some other analog circuitry. Some later all-in-one Macintosh computers also included analog boards, with the most recent being the iMac G3 and eMac. In these computers, the analog board functioned as the power supply to other parts within the system, and also functioned to control the CRT display within the computer. The other board was the logic board, which contained all of the computer's digital logic circuitry, such as the processor and memory. [END] 
[1]  [DOC] The Macintosh Plus computer is the third model in the Macintosh line, introduced on January 16, 1986, two years after the original Macintosh and a little more than a year after the Macintosh 512K, with a price tag of US$2599. As an evolutionary improvement over the 512K, it shipped with 1 MB of RAM standard, expandable to 4 MB, and an external SCSI peripheral bus, among smaller improvements. It originally had the same generally beige-colored case as the original Macintosh ("Pantone 453"), but in 1987, the case color was changed to the long-lived, warm gray "Platinum" color. It is the earliest Macintosh model able to run System 7 OS. [END] 
Answer: 
Macintosh Plus
Macintosh Plus