What types of pictures fies i can upload?

I can uploaded a GIF image perfectly.

I cant upload a PDF picture onto my blog. (X)

I can upload a PNG onto my blog perfectly as well.


I cant upload a PSD on to my blog. (X)

I can upload a JEP picture onto my blog.

I have uploaded the microsoft word document onto my blog but I had to save as as a PDF file and then drag it onto Photoshop and then save as as a JEP file and then putting it on my blog.