From mboxrd@z Thu Jan 1 00:00:00 1970 From: scj@yaccman.com (scj@yaccman.com) Date: Sat, 30 Jul 2016 16:50:56 -0700 Subject: [TUHS] History repeating itself (was: Unix v6 problem with /tmp) In-Reply-To: <20160730232803.GN86883@eureka.lemis.com> References: <579959F6.3050803@gmail.com> <20160728112330.GP3375@yeono.kjorling.se> <20160728135739.GA14303@mercury.ccil.org> <20160730075641.GT78278@eureka.lemis.com> <20160730232803.GN86883@eureka.lemis.com> Message-ID: <7f91cda35ceb8c56e22764b18cc282d1.squirrel@webmail.yaccman.com> A "standard" 80-column punched card held 80 12-bit columns, or 120 bytes. 1000 cards stacked up took roughly a foot, to get 120,000 bytes So to store a megabyte would take about 8 1/3 feet of cards. A gigabyte would be over a mile and a half high. A terabyte would be over 1500 miles high (half the width of the USA) A petabyte stack would be over six times the distance to the moon... Exponential growth may seem like business as normal today, but in reality, it boggles the mind... Steve >> >> Of course, those cards take time to fill and empty, which should be >> part of the bandwidth computation.