Uses
HTAs give the developer the features of HTML together with the advantages of scripting languages. They are popular with Microsoft system administrators who use them for system administration tasks, such as user-forms and pre-written network queries, since, for example, VBScript and JScript can access the Windows Task Manager. In general, HTA's are said to be suitable for many purposes, from prototypes to "full-scale" applications, especially where flexibility and speed of development are critical.
Read more about this topic: HTML Application