Blood counting machines aspirate a very small amount of the specimen through narrow tubing followed by an aperture and a laser flow cell. Laser eye sensors count the number of cells passing through the aperature, and can identify them; this is flow cytometry.
In computing, Extract, Transform and Load (ETL) refers to a process in database usage and especially in data warehousing that performs: Data extraction â extracts data from homogeneous or heterogeneous data sources.
The full ETL process is a must as the Transformation step is not always straight forward. Of course, application migration can and usually does include storage and database migration as well. The advantage of an ETL tool in this instance is its ready-to-use connectivity to disparate data sources/targets.