These are single stock etfs that I was told are dia. Is there any other meaning for it besides dow jones industrial average?

I'm sorry for the confusion, but there seems to be a misunderstanding. The ETF code "DIA" refers specifically to the SPDR Dow Jones Industrial Average ETF Trust, which tracks the Dow Jones Industrial Average Index. There is no other widely recognized ETF with the code "DIA" that would suggest a different meaning or investment focus.