a portable computer includes a processor , processor associated memory and control circuitry , and a memory disk drive assembly for storing software programs to form an integral computer unit . the integral computer unit has a cpu module , a display module , a user control module with a user control interface , module connectors , environmental protective barriers for blocking entry of emi and moisture into the computer unit and a vibration isolator for energy absorbingly mounting the unit to the drive assembly . the display module includes a display device that is separately housed and removably interconnected with the cpu module . the modules are connected by hinges along at least one interconnecting edge of each module . the module connectors are disposed along at least one interconnecting edge of each of the modules to permit separation of the modules at non - hinged edges and pivotal movement about the hinged edges for improved accessibility . the connecting hardware may include a protrusion and groove in each module . preferably , a gasket is included between the protrusion and groove . the computer preferably includes a fan assembly with an air sensor for sensing airflow through the fan assembly .