PWM可以是下列意思：

• 脉冲宽度调变（Pulse Width Modulation的缩写）
• PWM (窗口管理)，一种 X Window 管理工具。

PWM may refer to:

• Position weight matrix, a representation in motifs in biological sequences
• Pulse-width modulation, a technique for encoding information into a signal
• PWM (window manager), a Unix-based X window manager