what is ? /jpeg/bmp/tiff/gif/ etc.? an what do they do each one

[mary kay]

Hi........Again...... I would like to know what do each one of these mean, an what do they do an what are they used for an how do i use them , an how would they be helpful to me an anyone else .......?

/jpeg/bmp/gif/ping/tiff/pgm/ftp/ppm/xpm/png/ps/xwd/jpe/doc/jpg/psd/pdf/ppm/psd/txtzip/

.....what are they an what they mean??? .....If anyone have any info. on 1 or more of these, or all please reply ??? ((PLEASE HELP PLEASE))....Thank you...A.K.A Benice

[racefan20]

Type each one into Google (individually) and you will get lots of info.