These changes made to the disability questions mean that the population identified in 2008 is different from that identified in previous years and the results should not be compared. For a summary of all changes to the ACS 2008 survey see: http://www.census.gov/acs/www/Downloads/SummaryResultsACS2006ContentTest.pdf. Below are the disability questions used in the ACS 2003-7 and those used in the ACS 2008, with descriptions of the major differences between the questions with similar concepts.
Definition of undesirable discharge. : a formal release from military service under conditions other than honorable.
Electrostatic discharge (ESD) is the sudden flow of electricity between two electrically charged objects caused by contact, an electrical short, or dielectric breakdown. A buildup of static electricity can be caused by tribocharging or by electrostatic induction. The ESD occurs when differently-charged objects are brought close together or when the dielectric between them breaks down, often creating a visible spark.