There's a description of the "laptops" used in Twister here:
Probably much the same for Congo.
In the story, the two rival chase teams --one corporate sponsored, one low-tech university funded-- both have sets of computer equipment that was to match their incomes. SGI product placement dictated that ALL of the computers in the film had to be SGIs, so we had the task of making not only two distinctly different sets of graphics for nearly every scene, but different-looking EQUIPMENT between the two teams. This was nowhere more evident than with the SGI "laptops," which of course didn't exist. With the tireless dedication and help of Dan Evanicky at SGI, we were able to design and build two different fake laptop shells around the SGI Corona LCD flatscreen displays, with seven functional and seven dummy cases for each design, we had a handful to take care of; each "laptop" had a powerful custom backlight run off a separate 12-volt DC power supply and multiple cables which ran back off the set (often through mud and puddles) to the Indy CPUs which fed them. Each shell was custom-milled for us by IDE, a prototype manufacturer in the Silicon Valley.