Jeff Walther wrote:
  Additionally, the Outbound Laptop is an
interesting beast in that it
 uses 2.5" IDE hard drives.   This is the first Macintosh to use an
 IDE device by many many years.   I don't think any Apple Mac used
 them until the Quadra 630 and its performa and LC cousins. 
 Perhaps true, but there were macs with 3.5" st-506 drives long before
 that.
 
The mac powerbook 150 used a 2.5" IDE drive. It was low cost 68030
machine, circa 1994.
--tom