---
title: USBSpec.h User-Space
framework: IOKit
role: collectionGroup
role_heading: API Collection
platforms: []
path: iokit/usbspec_h_user-space
---

# USBSpec.h User-Space

## Topics

### Constants

- [USB Descriptor and IORegistry constants](usbspec_h_user-space/usb_descriptor_and_ioregistry_constants.md)
- [Apple USB Vendor ID](1424851-apple_usb_vendor_id.md)
- [Device Capability Types](1424953-device_capability_types.md)
- [Device Class Codes](1424988-device_class_codes.md)
- [Device Request](1424997-device_request.md)
- [Device Request Recipient](1424890-device_request_recipient.md)
- [Device Request Type](1425052-device_request_type.md)
- [DFU Class Attributes](1424990-dfu_class_attributes.md)
- [Endpoint Descriptor bits](1424773-endpoint_descriptor_bits.md)
- [Endpoint direction](1424768-endpoint_direction.md)
- [Endpoint type](1424978-endpoint_type.md)
- [Feature Selectors](1424883-feature_selectors.md)
- [HID Protocol](1424894-hid_protocol.md)
- [HID report types](1424657-hid_report_types.md)
- [HID requests](1424744-hid_requests.md)
- [Interface Class](1424756-interface_class.md)
- [Interface SubClass](1424847-interface_subclass.md)
- [Printer Class Requests](1424817-printer_class_requests.md)
- [USB Descriptors](1424957-usb_descriptors.md)
- [USB Device Capability Type constants](1425036-usb_device_capability_type_const.md)
- [USB Power constants](1424648-usb_power_constants.md)
- [USB Release constants](1424886-usb_release_constants.md)