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.
Installing Windows Vista / Windows 7 on the ThinkPad T420 So you decided you want to remove Lenovoâs factory install and start things from scratch. Or maybe you have a shiny new hard drive or SSD that you want to put in but need help installing the OS back on.lso download  Lenovo System Update  and save this on the USB (see below for link). I want to use a different version of Windows 7 (i.e. 64bit to 32bit) or wish to use Windows Vista instead for my clean install. On the safe side its best to gather the drivers from the Lenovo Support to avoid compatibility issues.