The Customer Engineering training course starts, and a Suggestion Program for employees is established.
IBM redesigns the punch card to hold 80 columns, almost double the previous capacity. The patented new design, featuring rectangular holes and called the "IBM card," becomes so popular that the name essentially becomes synonymous with punched cards.
The IBM Type 4 Tabulator is introduced, the first direct subtraction machine. Before the Type 4 tabulator, bookkeepers had to add negative amounts as complementary figures. IBM's subtracting machine saved calculations and bookkeeping time.
The first public address and program signaling systems for schools are developed (and are known later as "Schoolmaster".)
