Computer system comprising a computer with a touch-sensitive display and a handheld stylus for the precise operation of a touch-sensitive display screen, whereby the stylus - is designed for the purpose of controlling functions of the computer by means of touching the display screen, - comprises an oblong housing, which is designed in such a way that the stylus is provided to be held in one hand like a pen, and - comprises a tip, which is designed for touching the display screen, whereby the computer comprises a receptacle for the stylus, characterized in that - the stylus comprises a laser distance meter integrated into the housing for measuring distances to spatial points along an emission direction, - the computer and the stylus are designed for transmitting data about measured distances from the stylus to the computer via radio, and - the computer system is configured for the purpose of providing a first and a second distance measuring mode as selectable at the stylus, when it is located in the receptacle, wherein - upon selection of the first distance measuring mode, upon triggering of a distance measurement, a distance from a first housing edge of the computer to a spatial point is measured by means of the distance meter of the stylus, and - upon selection of the second distance measuring mode, upon triggering of a distance measurement, a distance from a second housing edge, which is opposite to the first housing edge, of the computer to a spatial point is measured by means of the distance meter of the stylus, and - the computer comprises at least one switch for triggering a distance measurement, in particular wherein the switch is located on the housing of the computer or the display screen provides a virtual switch. - is designed for the purpose of controlling functions of the computer by means of touching the display screen, - comprises an oblong housing, which is designed in such a way that the stylus is provided to be held in one hand like a pen, and - comprises a tip, which is designed for touching the display screen, whereby the computer comprises a receptacle for the stylus, characterized in that - the stylus comprises a laser distance meter integrated into the housing for measuring distances to spatial points along an emission direction, - the computer and the stylus are designed for transmitting data about measured distances from the stylus to the computer via radio, and - the computer system is configured for the purpose of providing a first and a second distance measuring mode as selectable at the stylus, when it is located in the receptacle, wherein - upon selection of the first distance measuring mode, upon triggering of a distance measurement, a distance from a first housing edge of the computer to a spatial point is measured by means of the distance meter of the stylus, and - upon selection of the second distance measuring mode, upon triggering of a distance measurement, a distance from a second housing edge, which is opposite to the first housing edge, of the computer to a spatial point is measured by means of the distance meter of the stylus, and - the computer comprises at least one switch for triggering a distance measurement, in particular wherein the switch is located on the housing of the computer or the display screen provides a virtual switch. - the stylus comprises a laser distance meter integrated into the housing for measuring distances to spatial points along an emission direction, - the computer and the stylus are designed for transmitting data about measured distances from the stylus to the computer via radio, and - the computer system is configured for the purpose of providing a first and a second distance measuring mode as selectable at the stylus, when it is located in the receptacle, wherein - upon selection of the first distance measuring mode, upon triggering of a distance measurement, a distance from a first housing edge of the computer to a spatial point is measured by means of the distance meter of the stylus, and - upon selection of the second distance measuring mode, upon triggering of a distance measurement, a distance from a second housing edge, which is opposite to the first housing edge, of the computer to a spatial point is measured by means of the distance meter of the stylus, and - the computer comprises at least one switch for triggering a distance measurement, in particular wherein the switch is located on the housing of the computer or the display screen provides a virtual switch.