- 1933 IBM acquires the tools, patents and production facilities of Electromatic Typewriters, Inc., of Rochester, N.Y.
- 1934 IBM invests more than $1 million to redesign the Electromatic Typewriter, improve research facilities and establish service centers.
- 1935 The IBM Electric Typewriter, Model 01 (Improved), is introduced. Customer acceptance soon makes it the first successful electric typewriter in the United States.
- 1937 The Electromatic Typewriter Model 01 (Formsholder), Model 02 (Formswriter), Model 10 (Front Feed) and Model 01 (Carbon Ribbon Model) are announced.
- 1938 The Electromatic Typewriter Model 03 (Hektowriter) is announced.
- 1940 The Electromatic Typewriter Model 06 (Toll Biller) is announced.
- 1941 IBM announces proportional letter spacing.¹ However, the war effort delays product (Model 04) introduction until 1944. Also that year, the Electromatic Typewriter Model 08 (Auto. Formswriter) and Model 09 (Manifest) are announced.
- 1944 The IBM Electric Executive Typewriter, the first typewriter with proportional letter spacing, is introduced.
- 1944 The IBM Electric Typewriter Division moves from Rochester, N.Y. to Poughkeepsie, N.Y.
- 1946 The Chinese Typewriter and Model 04 Arabic Electric Typewriter are announced.
- 1947 The Model 07 Card Stencil Typewriter is announced.
- 1948 The IBM Model A Standard Electric Typewriter, which gives the typist a new feeling of comfort and control, is announced. Carriage return, back space, tabulator and shift are operated with a finger tip touch. A "multiple-copy control" ensures legible carbon copies and stencils. Also announced is the Electric Typewriter Executive Model A.² It is available with either proportional or standard spacing. The Model A remains the staple of IBM's typewriter product line until 1954.
- 1948 The Automatic Line Selector Models 01 and 06 are announced.
- 1949 The Carbon Ribbon Typewriter Model 1 is announced.
- 1950 The Model A Electric Formswriter is announced. Also introduced are partial carriage return and left hand palm tab.
- 1951 IBM rolls out the Model A Decimal Tabulation Typewriter, offering electric tabulation for statistical typing.³
- 1952 Changeable typebars are announced.
- 1952 IBM begins manufacturing typewriters in pastel colors.
- 1953 The Model A (Model 3) Toll Biller Typewriter debuts.
- 1953 The Models 1 & 6 Electric Typewriter - right hand palm tab and Model 6 Electric Pinfeed Formswriter are introduced.
- 1954 IBM introduces in March the IBM Model B Standard Typewriter and the IBM Model B Executive Typewriter. Both machines feature cushioned carriage, electric ribbon rewind, changeable typebars, multiple copy control and pastel colors.
- 1954 The Typedesk and form line selector are announced in May.
- 1955 The Electric Typewriter Division moves from Poughkeepsie to Kingston, N.Y., making it the first IBM division to have its own manufacturing, development, sales and service organization.
- 1956 The Model B Electric Typewriter (Input-Output) is announced.
- 1956 IBM breaks ground for a new typewriter manufacturing facility in Lexington, Ky.
- 1957 IBM begins to manufacture typewriter ribbons and carbon paper in Lexington.
- 1958 The IBM Electric Typewriter Division celebrates its 25th anniversary and delivers -- in Lexington -- its one-millionth IBM typewriter.
- 1958 The IBM 632 Electronic Typing Calculator with card output is announced.
- 1959 In January the IBM Model C Typewriter and the IBM Model C Executive Typewriter with 28 new features introduce more productivity enhancements, including personal touch control. A quarter million Model Cs are sold within the first 19 months.
- 1959 The Model C Hektowriter is announced in July.
- 1960 The IBM 632 Electronic Typing Calculator with paper tape output is announced.
- 1961 The IBM Selectric Typewriter is unveiled in July. This product replaces typebars and the moving carriage with a spherical printing element.
- 1964 To indicate more accurately the scope of its product line, the Electric Typewriter Division changes its name in August to the Office Products Division (OPD).
- 1964 The IBM Magnetic Tape Selectric Typewriter is announced. The MT/ST is capable of producing error-free typing at speeds of 150 words per minute (wpm).
- 1966 The IBM Selectric Composer and Magnetic Tape Selectric Composer are introduced.
- 1967 IBM introduces in April the Model D Executive Typewriter and the IBM Model D Standard Typewriter, the last IBM typebar typewriters. In all, the Model D incorporates some 250 improvements over the Model C at the time of its introduction.
- 1967 The IBM Paper Tape Selectric Composer is announced in May.
- 1967 A second OPD plant is opened in Austin, Tex. The 200,000 square foot facility occupies 400 acres.
- 1968 The IBM Braille (Model D) Typewriter becomes the first powered Braille writing machine available for individual use. Its keyboard is almost identical to that of a standard typewriter.
- 1969 IBM announces the Mag Card Selectric Typewriter.
- Some sources list this date as 1940
- Some sources list this date as May 1949
- Some sources list this date as June 1, 1950