AndrewW said:
...This is true even in current space rated hardware. The current CPU's that are space qualified are a few generations behind.
Not quite true - the needs of most space hardware preclude the 'speed' and capacity of modern CPUs and this 'fact' has to ignore, um, certain major players in the space arena... that does not mean they are generations behind.
Also, one must account for the fact that systems bound for space take several years generally to fabricate, test and deliver to their operational destinations (my father will retire next year - and his instruments built several years ago onboard New Horizons won't reach their priority destination till 2015...)
CPUs and all hardware for that matter, must operate in a hostile environment in terms of radiation damage (let alone heat/vacuum conditions). The relative density of components on say a modern PC CPU is such that the scatter damage from a single high-energy event can effectively ruin them. So from a reliability standpoint - given the huge dollars and manhours of investment - prudence precludes off the shelf mass manufactured components.
However, today, astronauts and tourists routinely carry fairly standard laptops aboard (and some onboard equipment is very off the shelf). Though, they have also experienced failures due to radiation events.
Taking this back to Traveller - the same can be assumed to hold true, just on a different scale. MGT does make some provisions for normal radiation exposure to crew - indicating hull would also not guarantee protection for computer systems as well. So they would require additionally redundancy, self diagnosis/repair, etc. at the hardware level and the application level.
Comparing space travelling computers with atmo shielded planet bound systems may be an apple and oranges sort of thing...