Answer:
Following are some ways the role of secretary has changed:
1) From Man to Women
Back in time, secretaries were men, but when during different wars (especially world war 1 and 2) men used to fly away, this title slipped to the women.
2) Change of responsibilities
The role of a secretary was mainly to make appointments, keep records. bring coffee for the boss, but now a secretary has been rebranded as an assistant or office administrator which covers the expanding responsibilities of an office.
3) From Dictation or Decision Making
Secretaries used to get dictated by their bosses but now they have become an important part of the decision making processes.