Delphi low-level machine parameter access

There are many very low-level parameters measured by PCs and their processors (e.g. core temperatures, fan-speeds, voltage levels at v开发者_StackOverflowarious parts of the motherboard and processor internals) which are available and displayed by the BIOS, and by some aaplication programs. How does one access these low-level (real-time) data via Delphi? Is there a library? Is there a Windows API?

See WMI.

[update] To use WMI in Delphi, you need to import "Microsoft WMI Scripting vx.x Library" in Delphi IDE. See this for example.

RRUZ did a nice series of articles on using WMI with Delphi.

He even created a WMI Delphi source code generator.