QWERTY: The Second Annual Festival of Type and the Letter Arts features a return performance by the enigmatic rhythm and words ensemble, the Boston Typewriter Orchestra. The festival begins on World Typewriter Day Friday with Brian Dewan performing and a 10th anniversary screening of Gary Hustwit’s documentary "Helvetica." The Boston Typewriter Orchestra takes the stage the second night before screenings of "Ink & Paper" and Doug Nichol’s new documentary "California Typewriter" featuring Tom Hanks, John Mayer, and Sam Shepard. Both evenings will host a gathering of typewriter poets, typewriter and letter art, and a type-in hosted by Eric Molbach.