并列题名：Design and implementation of the freeBSD operating system Design and implementation of the freeBSD operating system Design and implementation of the FreeBSD operating system Design and implementation of the 4.4BSD operating system The Design and Implementation of the 4.4 BSD Operating System The Design and Implementation of the 4.4BSD Operating System 并列题名：Design and implementation of real-time stream computing system 并列题名：Design and implementation of land information system 并列题名：Design and implementation of control system Design and implementation of file management system