To run MS-DOS mode 43 HP User Tools 43 Protecting Your OmniBook 44 To attach a security cable 44 To identify your OmniBook 44 To use password protection 45 To turn off password protection 46 Editing System Files 46 To edit system files 46 To recover system files 46 4 RECOVERING AND RESTARTING 48 Recovering OmniBook Files 48 To back up your files 48 To reinstall original software files on drive C 48 To clean up a disk 49 Restarting the OmniBook 50 Rebooting the OmniBook 50 To reboot normally (from drive C) 50 To reboot from a floppy disk 50 To reset the OmniBook 51 Upgrading the Hard Drive 51 To find the system software version and memory size 51 To replace the hard drive (drive C) 52 5 THE PERSONAL INFORMATION APPLICATIONS 57 Managing Your Time with Appointment Book 57 To start Appointment Book 58 To view your appointments 58 To change to a different day, month, or year 58 To add a new appointment 58 To add a new event 59 To delete an appointment or event 60 To run a program automatically 60 Listing People in Phone Book 60 To start Phone Book 60 To add a person to the list 60 To search for a person 61 Getting Answers from HP Financial Calculator 62 To start HP Calculator 62 To perform a math function on one number 62 To do simple arithmetic 63 3