Annual leave, personal leave, and long service leave are different types of leave entitlements that employees may receive.   They vary depending on the relevant Award and company policies.

Annual Leave:  Time off that employees accrue over a year of employment. Typically a full time employee gets 4 weeks of annual leave per year. 

Personal Leave:  Also referred to as sick leave, is provided to employees for absences due to illness, injury, or medical appointments. This is generally 2 weeks per year.

Long Service Leave: is provided to employees who have worked for a specific period with the same employer, usually 10 years.  Difference awards and different states have specific rules regarding Long Service Leave.  Seek specialist advice for paying this entitlement.