diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,3 +8,9 @@
 
 * Second version. Changed the output order, added documentation.
 
+## 0.2.1.0 -- 2023-06-22
+
+* Second version revised A. Changed the letter 'm' to 'd' that now means 'a number of significant digits'.
+Fixed some minor issues with documentation.
+
+
diff --git a/Data/ReversedScientific.hs b/Data/ReversedScientific.hs
--- a/Data/ReversedScientific.hs
+++ b/Data/ReversedScientific.hs
@@ -37,16 +37,16 @@
 --
 -- > let a = 58702730574235423475087390582374507304750234705847047403750375034750723045720387502357280345
 -- > let b = 58738475082532745724057082370582054703750278402705730573074052705780857034750537507053278
--- > showBignum 7 a == \"e91~5.87...m92~345\"
--- > showBignum 7 b == \'e88~5.87...m89~278\"
+-- > showBignum 7 a == "e91~5.87...d92~345"
+-- > showBignum 7 b == "e88~5.87...d89~278"
 --
 -- As it is seen from the numbers after \"e\" the first one is greater than the second one.
--- Nevertheless, if you append the three digits 345 to the end of the second one, the output here 
+-- Nevertheless, if you append the three digits 345 (hence \"d\" in the notation meanitg a number of significant digits) to the end of the second one, the output here 
 -- will be equivalent, but the modified second number will be greater than the first one.
 showBignum :: Int -> Integer -> String
 showBignum n x 
   | l0 < 6 = xShow
-  | l >= n = mconcat ["e", show (l - 1), "~", (c1:"."), k2s, "...m", show l0, "~", k3s]
+  | l >= n = mconcat ["e", show (l - 1), "~", (c1:"."), k2s, "...d", show l0, "~", k3s]
   | otherwise = xShow
       where xShow = show x
             l = length xShow
diff --git a/rev-scientific.cabal b/rev-scientific.cabal
--- a/rev-scientific.cabal
+++ b/rev-scientific.cabal
@@ -1,12 +1,12 @@
 cabal-version:      2.4
 name:               rev-scientific
-version:            0.2.0.0
+version:            0.2.1.0
 
 -- A short (one-line) description of the package.
 synopsis:           A library to provide special kind of big numbers writing. 
 
 -- A longer description of the package.
-description:        Provides a function that shows the somewhat "reversed" scientific notation of the big 'Integer' number so that it is easier (more likely exact) to compare at quick glance two numbers in such a notation by their order and values in the ordered list of the multiple values.
+description:        Provides a function that shows the somewhat "reversed" scientific notation of the big 'Integer' number so that it is easier (more likely accurately) to compare at quick glance two numbers in such a notation by their order and values in the ordered list of the multiple values. Is intended to be used in PhLADiPreLiO.
 
 -- A URL where users can report bugs.
 -- bug-reports: