.key文件是用Apple'创建的演示文稿；s演示软件Keynote，它是iWork软件包的一部分。Keynote适用于Mac OS X和iOS，是Microsoft Powerpoint的竞争对手。.key文件可以包含带有图片、图表、过渡和视频的幻灯片。
.key files are presentations, created with Apple's presentation software Keynote, which is part of the iWork package. Keynote is available for Mac OS X and iOS and is a competitor to Microsoft Powerpoint. .key files can contain slides with pictures, charts, transitions and videos.
