\documentclass[tikz]{standalone}
\usetikzlibrary{pie}
\begin{document}
\begin{tikzpicture}
	\pie[%
		color={red,violet,teal,blue},
		explode={0.1},
		hide number,
		text=inside,
		rotate=45,
		radius=1.8,
	]{%
		25/\textcolor{white}{UI},
		25/\textcolor{white}{Tasks},
		25/\textcolor{white}{UoD},
		25/\textcolor{white}{SDS}
	}
	\node [draw,fill=yellow,circle]{Types};
\end{tikzpicture}
\end{document}
