> PNG and JPEG files are also universally usable outside of browsers. JPEG files were the standard for photographs before the first browser was written. PNGs

> PNG and JPEG files are also universally usable outside of browsers. JPEG files were the standard for photographs before the first browser was written. PNGs are super easy to support if you don't care about gamma correction, so it's no surprise that they're widely used. Vector formats are another beast altogether. Notice from your example that you can't include the EMF in latex either, since an EMF is basically a set of windows draw commands. I'm not sure about the current status of Postscript in Word. Years ago you could embed EPS files but they wouldn't display and only print if you had a postscript printer. Vector formats are just difficult.