disk disk, Device used to read and write disk sectors disk, partition, label, mouse mouse, Devices used to read mouse and keyboard events for window systems event, keyboard, mouse, window system, pdev Pseudo-devices, files controlled by server processes. pseudo-device, device, server, client, read, write, iocontrol, pfs Pseudo-file-systems, File systems implemented by user-level server processes. server, pseudo-device, raid raid, Devices used to send ioctl's to RAID devices. raid command, raid device, scsi scsi, Devices used to send arbitrary SCSI commands to SCSI devices scsi command, scsi device, HBA, tty tty, general terminal interface