序 (w)

(xù) order; sequence; preface

序列 (w)

(xùliè) sequence

序列号 (w)

(xùlièhào) serial number; product key (software)

序幕 (w)

(xùmù) prologue

序数 (w)

(xùshù) ordinal number

序文 (w)

(xùwén) preface; foreword; preamble; recital (law); also written 敘文|叙文[xu4 wen2]

序曲 (w)

(xùqǔ) overture

序言 (w)

(xùyán) preface; introductory remarks; preamble; prelude

序跋 (w)

(xùbá) preface and postscript