radio shack made the same mistake as sears and montgomery wards, focusing too much on catalog sales.  they insisted on stocking their warehouse with 100,000 units before publishing an annual catalog. in the fast paced world of computers that meant they were sitting on 286s while 386s were what people wanted.  sam walton worked for jc penny, and quit, because they too were stuck in obsolete thinking. fashion trends, and electronics move way too rapidly to use the catalog model. he founded walmart and proved his point quickly.
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