This resulted in a distilled, concentrated set of programs. Each program had introductory programs called "Appreciation Sessions" that were used to sell the programs to top management and introduce the programs to middle management of a company. Each program also had 'Train-the-Trainer' programs and handbooks called "Institute Conductor's Manual" for the master trainers.[2] The TWI Service also developed a number of "Staff Only" training programs to support staff development and to improve the implementation success.