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2. Visual Acuity Test: Purpose, Procedure, and Results - Healthline

   www.healthline.com/health/visual-acuity-test

   The letters are different sizes and arranged in rows and columns. Viewed from 14 to 20 feet away, this chart helps determine how well you can see letters and shapes. ... At an eye doctor’s ...

3. Holy grail (web design) - Wikipedia

   en.wikipedia.org/wiki/Holy_grail_(web_design)

   Holy grail Layout with Dropping Footer. The holy grail is a web page layout which has multiple equal-height columns that are defined with style sheets. It is commonly desired and implemented, but for many years, the various ways in which it could be implemented with available technologies all had drawbacks. [1]

4. Matrix (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Matrix_(mathematics)

   A matrix with the same number of rows and columns is called a square matrix. [5] A matrix with an infinite number of rows or columns (or both) is called an infinite matrix. In some contexts, such as computer algebra programs, it is useful to consider a matrix with no rows or no columns, called an empty matrix.

5. Template:Bar chart - Wikipedia

   en.wikipedia.org/wiki/Template:Bar_chart

   Template:Graph:Chart is an alternative template that may ... Row 30, Column 1 data. {{Bar chart ... Leaving a cell completely blank can sometimes cause columns to be ...

6. Vertebral Column Diagram, Anatomy & Model | Body Maps

   www.healthline.com/human-body-maps/vertebral-column

   The vertebral column, also known as the spinal column, is a flexible column that encloses the spinal cord and also supports the head.It consists of various groups of vertebrae and is divided into ...

7. Wikipedia : Manual of Style/Accessibility

   en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/...

   Because the row header and column header may be spoken before the data in each cell when navigating in table mode, it is necessary for the column headers and row headers to uniquely identify the column and row respectively. Scope of headers (! scope="col" | and ! scope="row" |) This clearly identifies a cell as a header for a column or row.