diff --git a/README.md b/README.md
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@@ -20,6 +20,6 @@ Read the `SAS(r) packages - the way to share (a how to)- Paper 4725-2020.pdf` to
 ### Avaliable packages:
 
 - *SQLinDS*, allows to write SQL queries in the datastep
-- *DFA* (Dynamic Function Arrays), contains FCMP implementation of dynamic array, stac, fifo, ordered stack, and priority queue
+- *DFA* (Dynamic Function Arrays), contains FCMP implementation of dynamic array, stack, fifo, ordered stack, and priority queue
 - *dynMacroArray*, set of macros (wrappers for a hash table) emulating dynamic array in the datastep
 - *macroArray*, implementation of an array concept in macrolanguage (e.g. `%array(ABC[17] (1:17), macarray=Y); %do i = 1 %to 17; %put %ABC(&i.); %end;`)
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