1 Girls start having periods at different times depending on how quickly they are developing.  If a girl has not had her first period by the time she is 16, this is still probably normal, but it would be worth checking with a doctor.
IETMS stands for Interactive Electronic Technical Manual System. Israeli English Teachers' Network. Institution of Engineering and Technology Northern Ireland. Institute of Engineering Technology of Ontario (Canada) Interagency Environmental Technology Office (Washington, DC) Industrial Effluent Treatment Plant.
Windows Internet Explorer (IE, formerly Microsoft Internet Explorer, MSIE), is a series of graphical web browsers developed by Microsoft. It was included as part of the Microsoft Windows operating system, starting in 1995. It was first released as part of the add-on package Microsoft Plus! for Windows 95, that year.