You’ve been reading too much government propaganda.
The U.S. first class postage rate for the first ounce was 2 cents for Christmas 1931. The same postage for Christmas 2013 is to be 46 cents, which is 23 times the 1931 postage rate.
The Christmas turkey in 1931 was typically 39 cents per pound. If the 2013 price for Christmas turkey also increased 23 times, the price for the Christmas turkey would be $8.97 per pound, not the actual 49 cents to $1.23 per pound we are actually seeing in supermarkets for Christmas 2012.
Gasoline per gallon has increased about 23 times since 1931, but a good fraction of the increase is due to government taxes on gasoline.
The cost of a Vector Graphics microcomputer with two 8 inch floppy disk drives 92 kilobytes of storage each, 56 kilobytes of RAM, 80 character per line monochrome Crt monitor, and an NEC Spinwriter or a Diablo daisywheel printer was about $12,000 Christmas 1980. Only two years earlier a 16 kilobyte static RAM daughterboard was depp discount priced at #1,999.00 for the holiday season. Today....
I can’t tell you the entire history of the US Stamp price but since the 70s its kept in line with inflation.
Also the price of computers doesn’t have much to do with inflation so much as the technology used to make computers became cheaper, so not sure why you added that.