- QHBoxLayout
- QHButtonGroup
- QHeader
- QHebrewCodec
- QHGroupBox
- QHideEvent
- QHostAddress
- QHttp
- QHttpHeader
- QHttpRequestHeader
- QHttpResponseHeader
- QIconDrag
- QIconDragEvent
- QIconDragItem
- QIconFactory
- QIconSet
- QIconView
- QIconViewItem
- qiflush
- QImage
- QImageConsumer
- QImageDecoder
- QImageDrag
- QImageFormat
- QImageFormatPlugin
- QImageFormatType
- QImageIO
- QIMEvent
- QInputDialog
- QIntCache
- QIntCacheIterator
- QIntDict
- QIntDictIterator
- QIntValidator
- qio
- QIODevice
- QJisCodec
- QKbdDriverFactory
- QKbdDriverPlugin
- QKeyEvent
- QKeySequence
- QLabel
- QLayout
- QLayoutItem
- QLayoutIterator
- qlc
- QLCDNumber
- QLibrary
- QLineEdit
- QListBox
- QListBoxItem
- QListBoxPixmap
- QListBoxText
- QListViewItem
- QListViewItemIterator
- QLocale
- QLocalFs
- QMacMime
- QMacStyle
- QMainWindow
- QMap
- QMapConstIterator
- QMapIterator
- QMC
- QmcContext
- QmcDesc
- QmcGroup
- QmcIndom
- QmcMetric
- QmcSource
MAN (3)
Library functions, covering in particular the C standard library