Full Form of JPEF/GIF/MPEG/PNG and PDF

JPEG Stands for :---
Joint Photographic  Experts Group



J = Joint
P = Photograph
E = Experts
G = Group
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GIF Stands for :---
Graphic Interchange Format

G = Graphic
I = Interchange
F = Format
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MPEG Stands for :---
Motion Pictures Experts Group

M = Motion
P = Pictures
E = Experts
G = Group
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PNG Stands for :---
Portable Network Graphics

P = Portable
N = Network
G = Graphics
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PDF Stands for :---
Portable Document File

P = Portable
D = Document
F = File