A handheld electronic device comprising a housing having a keyboard support member and a base, the base having a first section spaced apart from and opposing the keyboard support member to define a cavity therebetween, the base having a second section that extends from the first section beyond an open end of the cavity, the housing further comprising opposed first and second sidewalls, the first sidewall protruding from a first peripheral side edge of the second section of the base and the second sidewall protruding from a second peripheral side edge of the second section of the base. A display assembly is slidably mounted to the housing and comprising a display screen on a front face thereof, the display assembly being slidable between a retracted position and an extended position, wherein in the retracted position a first portion of the display screen is received within the cavity facing towards the keyboard support member and a second portion of the display screen is viewable outside of the cavity and disposed between the first and second sidewalls, and in the extended position the first portion and the second portion of the display screen are viewable outside of the cavity.