Women were first brought into Bletchley Park after being approached at university or because of trusted family connections; debutantes especially were prized, as they were considered the most trustworthy due to their upper class backgrounds. These "debs" performed mostly administrative and clerical work. However, the personnel needs of Bletchley Park continued to grow. The heads of Bletchley Park next looked for women who were linguists, mathematicians, and even crossword experts.