diff --git a/README.md b/README.md
index 76d3d01..2b7f3f5 100644
--- a/README.md
+++ b/README.md
@@ -10,16 +10,20 @@
 - The special feature of this language is to make no difference between
 keywords and functions, even user functions.
 
-- Numbers (ie scalars) are in 128-bit quadruple precision format (long
-double). Binaries are 64-bits longwords format (long long int).
-
 - A GNU-readline-based interactive editor with autocompletion is provided.
 
 - Language extensions will soon be included:
- - file objects and functions,
- - date and time objects and functions,
- - shell-calling objects with return code, stdout and stderr treatment,
- - loading and saving stack, variables, programs from / to filesystem
+  - file objects and functions,
+  - date and time objects and functions,
+  - shell-calling objects with return code, stdout and stderr treatment,
+  - loading and saving stack, variables, programs from / to filesystem
+
+
+Multiple-precision floating-point computations with correct rounding are ensured by __MPFR library__ under GNU LGPL v3 or later
+
+
+Integer calculations are ensured by __GNU MP library__ (__GMP__) under GNU LGPL v3 and GNU GPL v2
+
 
 ## Implemented commands
 
@@ -30,7 +34,6 @@ This commands list match HP28s reserved words. Commands marked as 'new' do not e
 | GENERAL | nop |yes| yes| yes|
 | GENERAL | help/h/? | yes | yes| |
 | GENERAL | quit/exit/q| yes| yes| |
-| GENERAL | test | yes | yes| |
 | GENERAL | verbose | yes | yes| |
 | GENERAL | std | | yes| |
 | GENERAL | fix | | yes| |
@@ -38,6 +41,9 @@ This commands list match HP28s reserved words. Commands marked as 'new' do not e
 | GENERAL | version | yes | yes| |
 | GENERAL | uname | yes | yes| |
 | GENERAL | edit | | yes| |
+| GENERAL | type | yes | yes| yes |
+| GENERAL | default | yes | yes| yes |
+| TEST | test | yes | yes| yes |
 | REAL | + | | yes| |
 | REAL | - | | yes| |
 | REAL | neg | | yes| |
@@ -47,8 +53,10 @@ This commands list match HP28s reserved words. Commands marked as 'new' do not e
 | REAL | % | | yes| |
 | REAL | %CH | | yes| |
 | REAL | ^ | | yes| |
+| REAL | pow (_alias for_ ^) | | yes| yes |
 | REAL | sqrt | yes | yes| |
 | REAL | sq | yes | yes| |
+| REAL | sqr (_alias for_ sq) | yes | yes| yes |
 | REAL | mod |yes| yes| |
 | STACK | drop | | yes| |
 | STACK | swap | | yes| |
@@ -202,7 +210,7 @@ This commands list match HP28s reserved words. Commands marked as 'new' do not e
 | LOGS | tanh | | yes | |
 | LOGS | atanh | | yes | | |
 
-## HP28s commands which won't be implemented
+## HP28s commands which are not (or won't be) implemented
 
 **MEMORY**
  mem, menu, order, path, home, crdir, clusr,
@@ -237,6 +245,39 @@ This commands list match HP28s reserved words. Commands marked as 'new' do not e
 **CUSTOM**
  menu, custom
 
+## Tests
+
+Unit tests are given as txt files in the test subdirectory.
+
+Use the command 'test' to run a test file, eg
+```
+# cd test_directory/
+# rpn
+rpn> "entry.txt"
+rpn> test
+## ENTRY TEST
+# real decimal PASSED
+# real hex PASSED
+# real binary PASSED
+(...)
+```
+or
+```
+# cd test_directory/
+# rpn \"entry.txt\" test
+## ENTRY TEST
+# real decimal PASSED
+# real hex PASSED
+# real binary PASSED
+(...)
+```
+
+The test output is done on stdout and is not stacked in rpn.
+
+| __test sheet__ | __description__ |
+| - | - |
+| entry.txt | testing real, binary, symbol, string and program entries |
+
 ## Notes
  Compiled with g++ Makefile generated by automake.
- External dependencies needed: automake, readline (libreadline-dev)
+ External dependencies needed: automake, readline (libreadline-dev), MPFR library, GNU MP library