Many specialty stores have carved out niches that cannot be duplicated online, selling rare records or used discs.
Like the iDisk, Dropbox and Microsoft's SkyDrive create an icon on your computer — a folder, in this case — whose contents are duplicated online.
A number of regional banks have also double-dipped with customer payments and even JPMorgan Chase, the nation's biggest bank, recently had a minor brush with duplicate online withdrawals.
Duplicate online and paper responses were excluded.
Still, Mr. Greenberg was skeptical that other comedians would be able to duplicate the online sales results that Louis C. K. enjoyed.
The goal of the ad deal with AOL is to find out if the "big buzz" that Publishers Clearing House gets for its sweepstakes from running TV commercials can be duplicated with online marketing, Mr. Zeller said.
Two online duplicates, one invalid online response, five paper duplicates of online responses and seven ineligible paper responses from medical or house officers were excluded.
Okbridge.com was the first Web site to offer online duplicate bridge, in 1992, and now has 18,000 members in 90 countries around the world paying $99 a year to play bridge with each other day and night.
Criteria for choosing pairs of duplicated genes included online annotation mapping [ 47, 48] and BLAST sequence alignment of the entire CDS and protein sequences with a cutoff expect value of 1e-20 and bit score of >100.
Artificial duplicate frequency correlations (see Online Methods) match overall duplicate frequencies for all treatments except a single 10ng, poorly-amplified, adapter-containing Illumina library (Additional file 1: Figure S5-7), where 40% of the reads were predominantly artificial, high frequency duplicates (Additional file 1: Figure S8 and S9).
