[how-to] adj (1926): giving practical instruction and advice (as on a craft) "~ books on all sorts of hobbies --Harry Milt"
[2]how-to n (1954): a practical method or instruction "the ~s of balancing a checkbook"
[how-to] adj (1926): giving practical instruction and advice (as on a craft) "~ books on all sorts of hobbies --Harry Milt"
[2]how-to n (1954): a practical method or instruction "the ~s of balancing a checkbook"
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012