The T1100 was released in 1985 at 9lbs. The NEC Ultralight was 1988 at 4.4lbs and set the standard for "notebook" (as opposed to "laptop"). One of the reviews

The T1100 was released in 1985 at 9lbs. The NEC Ultralight was 1988 at 4.4lbs and set the standard for "notebook" (as opposed to "laptop"). One of the reviews in TFA mentions that they considered it too bulky to qualify as a "notebook" computer. This computer was on the heavy side of normal for a "laptop" of the day, but definitely not light for the day. [edit] A more fair comparison might be the Compaq LTE (1989), which had a hard-drive and weighed under 7 lbs (if someone can find a more specific number let me know). The LTE/386 came out not long after this, weighed 7.5lbs and had a similar thickness.