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.
4. Use some hard drive and optical drive spin-down software to reduce the power consumpition of laptop. 5. When long time without using laptop, Keep it in standby or sleep mode. It can both save the power and extend the LENOVO ThinkPad S230u notebook battery life.6. Store your battery in a cool and dry place when don't use. 7. If you usually keep your laptop plugged in fixed power or rarely use it.he Follow suggestions will help you protect your laptop battery life. Here's How: 1. Before using the new battery, Please read the LENOVO ThinkPad S230u battery maintain parts of the user manual carefully.