-<tr><td colspan="4">INPUT & OUTPUT OPERATIONS</td></tr>
-<tr><td>Word</td><td>Name</td><td>Operation</td><td>Description</td></tr>
-<tr><td>SPACE</td>
- <td>SPACE</td>
- <td> -- </td>
- <td>A space character is put out. There is no stack effect.</td>
-</tr>
-<tr><td>TAB</td>
- <td>TAB</td>
- <td> -- </td>
- <td>A tab character is put out. There is no stack effect.</td>
-</tr>
-<tr><td>CR</td>
- <td>CR</td>
- <td> -- </td>
- <td>A carriage return character is put out. There is no stack effect.</td>
-</tr>
-<tr><td>>s</td>
- <td>OUT_STR</td>
- <td> -- </td>
- <td>A string pointer is popped from the stack. It is put out.</td>
-</tr>
-<tr><td>>d</td>
- <td>OUT_STR</td>
- <td> -- </td>
- <td>A value is popped from the stack. It is put out as a decimal integer.</td>
-</tr>
-<tr><td>>c</td>
- <td>OUT_CHR</td>
- <td> -- </td>
- <td>A value is popped from the stack. It is put out as an ASCII character.</td>
-</tr>
-<tr><td><s</td>
- <td>IN_STR</td>
- <td> -- s </td>
- <td>A string is read from the input via the scanf(3) format string " %as". The
+<tr><td colspan="4"><b>INPUT & OUTPUT OPERATORS</b></td></tr>
+<tr>
+ <td style="border: 2px solid blue"><u>Word</u></td>
+ <td style="border: 2px solid blue"><u>Name</u></td>
+ <td style="border: 2px solid blue"><u>Operation</u></td>
+ <td style="border: 2px solid blue"><u>Description</u></td>
+</tr>
+<tr><td style="border: 2px solid blue">SPACE</td>
+ <td style="border: 2px solid blue">SPACE</td>
+ <td style="border: 2px solid blue"> -- </td>
+ <td style="border: 2px solid blue">A space character is put out. There is no stack effect.</td>
+</tr>
+<tr><td style="border: 2px solid blue">TAB</td>
+ <td style="border: 2px solid blue">TAB</td>
+ <td style="border: 2px solid blue"> -- </td>
+ <td style="border: 2px solid blue">A tab character is put out. There is no stack effect.</td>
+</tr>
+<tr><td style="border: 2px solid blue">CR</td>
+ <td style="border: 2px solid blue">CR</td>
+ <td style="border: 2px solid blue"> -- </td>
+ <td style="border: 2px solid blue">A carriage return character is put out. There is no stack effect.</td>
+</tr>
+<tr><td style="border: 2px solid blue">>s</td>
+ <td style="border: 2px solid blue">OUT_STR</td>
+ <td style="border: 2px solid blue"> -- </td>
+ <td style="border: 2px solid blue">A string pointer is popped from the stack. It is put out.</td>
+</tr>
+<tr><td style="border: 2px solid blue">>d</td>
+ <td style="border: 2px solid blue">OUT_STR</td>
+ <td style="border: 2px solid blue"> -- </td>
+ <td style="border: 2px solid blue">A value is popped from the stack. It is put out as a decimal integer.</td>
+</tr>
+<tr><td style="border: 2px solid blue">>c</td>
+ <td style="border: 2px solid blue">OUT_CHR</td>
+ <td style="border: 2px solid blue"> -- </td>
+ <td style="border: 2px solid blue">A value is popped from the stack. It is put out as an ASCII character.</td>
+</tr>
+<tr><td style="border: 2px solid blue"><s</td>
+ <td style="border: 2px solid blue">IN_STR</td>
+ <td style="border: 2px solid blue"> -- s </td>
+ <td style="border: 2px solid blue">A string is read from the input via the scanf(3) format string " %as". The