A floppy disk with both sides prepared for recording data. You can store twice as much data on a double-sided disk, but you need to use a double-sided disk drive. All modern disks and disk drives are double-sided.
Double Sided Circuit Cards
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#1 in Quickturn PCBs, $500 off 1st order, protos on time or Free. Lead-Free solder available protos and production. Industry's Best on time shipment.
Double Sided Tape
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Over 15,000 packaging supplies in stock including double sided foam tape & double sided masking tape. Huge catalog! Same-day shipping.
PCB123: Double Sided Circuit Cards
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Offers PCB solutions, from design to order. Provides free design software that quotes board designs from within.