The Terabyte is marketed as a sac for the urban environment; which means that it has a lot of pockets inside and outside.
The other compartment is designed to take a laptop, this compartment is made up of a material called 'd3o intelligent shock absorption'. The swing-tag quotes d3o as being 'soft & flexible but on impact its intelligent molecules lock together to absorb impact energy'
This compartment also has a pocket for a hydration bladder with the outlet hole at the top of the sac.
The rest of the sac is pretty much standard for a daysac, a couple of zipped pockets on the outside, mesh pockets on the sides, a hip-belt and chest strap although personally I can't see the point of either of these on such a small sac; luckily both can be removed.
The shoulder straps are a bit on the thin side but are well padded and are comfortable.
|d3o computer pocket|
The back has flow technology which is mainly ribbed foam on either side of the sac to create a channel up the middle to allow airflow.
Over the next month, I will be using it as my main sac for work; which means carrying amongst other things, waterproofs, eye-glasses, packed lunch, first aid kit, a kindle, phone charger and assorted batteries and chargers.
One extra to add is that this sac will be compared to a 15+ year old Berghaus Dart 35; as this has been my everyday sac for that time, and as yet I haven't found a sac to replace it.
More can be seen at the Berghaus website.