Elements of use case diagram: Actor. â¢ Actor is someone interacting with use case. (system function). Named by noun. â¢ Similar to the concept of user, but. a user can play different roles; (example: a prof. can be instructor and. researcher â plays 2 roles with two systems). â¢ Actor triggers use case. â¢ Actor has responsibility toward the system (inputs), and Actor have expectations from the system (outputs).
Related Manuals for Lenovo Laptop. Summary of Contents for Lenovo Laptop. Page 1: User Guide Lenovo User Guide Read the safety notices and important tips in the included manuals before using your computer. Page 2 Notes â¢ Before using the product, be sure to read Lenovo Safety and General Information Guide first.
One common way is to press the Del key when you first power on, but that's not necessarily right. for your computer. Watch the screen carefully when you first boot; there's often a message telling you what to do. If not, check your system documentation or check with the Motherboard manual.y work computer is a Lenovo system, and they use F1 and F12 for two different pre-OS options -- F1 is the BIOS Setup Utility (use this to access your BIOS), and F12 is the Boot Menu, Lenovo support describes the process, as well as some other, more involved options, but Shift + Shut Down is the simplest method. -Ben.