MS Excel
Excel uniquely identifies cells within a worksheet with a cell name

Column letters and row numbers
Cell locator coordinates
Column numbers and row letters
Cell names

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MS Excel
You can select a single range of cells by

Pressing the Shift key and an arrow key
Dragging over the desired cells
Pressing the Ctrl key while dragging over the desired cells
Clicking the upper-left cell in a group of cells and then pressing the Shift key while clicking the lower right cell in a group of cells

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