introduction

the act of beginning something new; "they looked forward to the debut of their new product line"

the first section of a communication

formally making a person known to another or to the public

a basic or elementary instructional text

a new proposal; "they resisted the introduction of impractical alternatives"

the act of putting one thing into another

the act of starting something for the first time; introducing something new; "she looked forward to her initiation as an adult"; "the foundation of a new scientific society"