Answer:
This type of unemployment is called structural unemployment
Step-by-step explanation:
Structural unemployment refers to the unemployment which happens due to a structural change in the economy, for instance, when there is a development of a new technology or industry. For example, when a person finds a cure for all dental diseases, and as a result, a dentist loses his/her job, this will lead to being structurally unemployed.
As we can see in the scenario presented above, the invention has cost the typists their jobs, and this is because there is a mismatch between the skills of the typists and the potentials offered by the invention.