additional installs

#additionalinstall/TABLECALCULATION.md

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+# Tablecalculation
+These are useful programs if you want to do table calculations like csv.
+
+| program    | description                                      |
+| ---------- | ------------------------------------------------ |
+| sc-im      | program to write and read csv data; sc improved  |
+

#additionalinstall/THINKPAD.md

@@ -1,4 +1,4 @@
-# Thinkpadspecific
+# Thinkpad
 These are a bunch of useful programs if you own a thinkpad.
 
 | program    | description                                      |

#additionalinstall/tablecalculation.sh

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+#!/bin/sh
+yay -S sc-im