The last column is column XFD which is the 16,384th column.
Column AA
Column AA.
That depends on the version. Up to version 2003, it was row 65,536. From Excel 2007 onwards, it is row 1,048,576.
Column 255 in Excel is column IU.Column 255 in Excel is column IU.Column 255 in Excel is column IU.Column 255 in Excel is column IU.Column 255 in Excel is column IU.Column 255 in Excel is column IU.Column 255 in Excel is column IU.Column 255 in Excel is column IU.Column 255 in Excel is column IU.Column 255 in Excel is column IU.Column 255 in Excel is column IU.
Excel 2010 is the latest version. A 2012 version is under development.
Column IV is not the last column in Excel 2007, as it was in Excel 2003. In Excel 2003 the last column is IV which is column 256. In Excel 2007 the last column is XFD, which is column 16384.
Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.Autofit is the facility in Excel to widen out a column to fit the widest entry in the column so that it is visible in full.
Column headings start at A. After reaching Z, the next is AA, then AB and so on. What the last column is will depend on the version of Excel that you have. Column IV, which is the 256th column, is in the versions up to Excel 2003. From Excel 2007 there are 16,384 columns and last one is column XFD.
column margin
A column break is a term associated with Microsoft Word, not Excel. In Word, it starts a new column of text. In Excel, you can just go to another column to start entering new data.
It is column BA
There is no special name. It would be column A. It is the first column. It could contain headings for each row.