[Oden]

Hello Sue,

Merriam-Webster's Learner's Dictionary

data

Meaning:
1 [plural] : facts or information used usually to calculate, analyze, or plan something
- She spent hours reviewing the data from the experiment.
- They made their decisions based on the survey data.
- Much of the data is inconclusive.
- The company has access to your personal data.

usage
Data is plural in form but is used with both plural and singular verbs.
- Is this data accurate?
- Are these data reliable?
When used with plural verbs, data is thought of as the plural form of the noun "datum". It is usually used with plural verbs only in formal or technical writing.
- Many of these data are incorrect.

2 [noncount] : information that is produced or stored by a computer
- She works as a data entry clerk.
- There was too much data for the computer to process.
- He is an expert in data retrieval. [=finding information stored on a computer]

Description of Data Formats Supported by BioIDE

Illumina Format

Currently the matrix format produced by Illumina BeadStudio is supported. In this format, all data are stored in a single file as a two-dimensional matrix. After a few header lines, the individual IDs are listed on a single line separated by tab. After that line, genotype data for each marker is organized as one line per marker with the marker IDs (rs#) as the first column. For each individual on each marker, the genotype represented by two alleles is separated from its quality score by a vertical divider.

I think that data is an uncountable noun and means "information that is produced or stored by a computer." Shouldn't are have been "is"?