what is the chart based on?
the 200 most popular music albums and EPs
what is a recording act remembered by?
by its "number ones"
how often is it published?
weekly
on what day?
Saturday
are all albums included in the chart?
no
which are not?
Albums that are not licensed for retail sale in the United States
can these be bought in the US anyways?
yes
What did Nielsen start keeping track of?
sales
when did he start?
in 1991
what days were they between?
originally Monday to Sunday
when did this change?
July 2015
to what?
Friday to Thursday.
what happened to titles sold by retail outlets in the past?
it was reversed
what happened before it was reversed?
they were ineligible for charting,
when was it reversed?
November 7, 2007
what is Billboard 200?
a record chart
what is it used to convey?
the 200 most popular music albums and EPs in the United States
is it worldwide?
no
are digitals eligible?
yes
where is the list published?
"Billboard" magazine.