On the Job Posting page, there is a column that has “Posting Type”. What does that mean?

There are 3 different types of job postings: External, Internal and Agency. External: Open to all applicants. Agency: Open to agency employees, persons eligible for reemployment, applicants who are eligible for veteran's preference under the provisions of K.S.A. 75-2955 and persons who separate from state service due to a permanent disability for which the employee receives disability benefits from either the Kansas public employee retirement system or the United States social security administration. Internal: Open to all state employees, persons eligible for reemployment or reinstatement, applicants who are eligible for veteran's preference under the provisions of K.S.A. 75-2955 and persons who separate from state service due to a permanent disability for which the employee receives disability benefits from either the Kansas Public Employee Retirement System or the United States social security administration.