A rack system comprising a rack , a linking member , and a first equipment including a first slide rail assembly , wherein the first slide rail assembly comprises a first rail and a second rail displaceable with respect to the first rail ; the rack system further comprising a first interlock device provided between the first rail of the first slide rail assembly and the linking member through the opening ; wherein while being displaced from a retracted position (L1) with respect to the first rail of the first slide rail assembly to a predetermined position (L2) in an opening direction, the second rail of the first slide rail assembly drives the first interlock device and thereby displaces the linking member from a first position (P1) to a second position (P2); and wherein a seat member is mounted to a supporting frame of the first rail of the first slide rail assembly , and a first locking member of the first interlock device is movably mounted between the supporting frame and the seat member , and wherein the seat member includes at least two wall portions and forming a space therebetween through which the first locking member is movable; characterized in that the first equipment includes a chassis , wherein the chassis has a wall , and the wall has an opening , and in that a first engaging member of the first interlock device is movably mounted to a supporting rail via a mount , and the mount or the supporting rail has at least one guiding feature ; and in that the mount is movably mounted to the supporting rail by at least one connecting feature extending through a portion of the at least one guiding feature , wherein the first engaging member of the first interlock device can be arranged to the mount via at least one supporting feature . the first slide rail assembly comprises a first rail and a second rail displaceable with respect to the first rail ; the rack system further comprising a first interlock device provided between the first rail of the first slide rail assembly and the linking member through the opening ; wherein while being displaced from a retracted position (L1) with respect to the first rail of the first slide rail assembly to a predetermined position (L2) in an opening direction, the second rail of the first slide rail assembly drives the first interlock device and thereby displaces the linking member from a first position (P1) to a second position (P2); and wherein a seat member is mounted to a supporting frame of the first rail of the first slide rail assembly , and a first locking member of the first interlock device is movably mounted between the supporting frame and the seat member , and wherein the seat member includes at least two wall portions and forming a space therebetween through which the first locking member is movable; characterized in that the first equipment includes a chassis , wherein the chassis has a wall , and the wall has an opening , and in that a first engaging member of the first interlock device is movably mounted to a supporting rail via a mount , and the mount or the supporting rail has at least one guiding feature ; and in that the mount is movably mounted to the supporting rail by at least one connecting feature extending through a portion of the at least one guiding feature , wherein the first engaging member of the first interlock device can be arranged to the mount via at least one supporting feature . <EOS>