diff --git a/MANUAL.md b/MANUAL.md
index 8ee5e84..0cae099 100644
--- a/MANUAL.md
+++ b/MANUAL.md
@@ -1,9 +1,9 @@
 # **rpn** - reference manual
 
 **rpn**
-- is a full-featured **math-oriented language** inspired by Hewlett-Packard **R**everse **P**olish **L**isp (**HP28S** user manual is provided as a reference), it includes at least **stack**, **store**, **branch**, **program**, **complex**, **real**, **test**, **trig** and **logs** commands
-- is implemented as a **command-line calculator** for GNU/Linux
-- brings powerfull calculation facilities on floating point numbers with __arbitrary precision__, provided by **GNU MP** and **GNU MPFR** libraries
+- is a structured full-featured **math-oriented language** inspired by Hewlett-Packard **R**everse **P**olish **L**isp (**HP28S** and **HP48GX** user manual are provided as references), including **real**, **complex**, **stack**, **store**, **branch**, **program**, **test**, **trig** and **logs** commands and more to come
+- is implemented as a **command-line calculator** for most popular Linux distributions
+- brings powerfull calculation facilities on floating point numbers with __arbitrary precision__ provided by **GNU MP** and **GNU MPFR** libraries
 - uses that so cool **reverse polish notation**
 
 ## Quick examples
@@ -45,7 +45,7 @@ rpn> erase 10000 prec pi
 rpn> 
 ```
 
-### Objects
+### object types
 
 Following objects are managed: **floating numbers**, **complexes**, **symbols**, **strings**, **programs**, plus language **keywords** (commands and flow controls)
 ```
@@ -57,7 +57,7 @@ Following objects are managed: **floating numbers**, **complexes**, **symbols**,
 rpn> 
 ```
 
-### Command line
+### command line
 
 **rpn** is a cli interface with an **interactive editor** with autocompletion provided by **linenoise-ng**, see https://github.com/arangodb/linenoise-ng
 
@@ -74,6 +74,21 @@ q        -        pow      bin      mant     max      p->r     default  ==
 rpn> 
 ```
 
+## entry
+
+**reals** can be entered in decimal, binary, hexadecimal or arbitrary base from 2 to 62
+
+base is entered with format `<base>b<number>`
+
+ex:
+```
+rpn> 5.6 0xaabb 0b1101 7b1252
+4> 5.6
+3> 0xaabb
+2> 0b1101
+1> 7b1252
+```
+
 ## keywords
 
 ### general
diff --git a/src/program.cpp b/src/program.cpp
index 86c1782..64378c4 100644
--- a/src/program.cpp
+++ b/src/program.cpp
@@ -21,7 +21,7 @@ program::keyword_t program::s_keywords[] =
     { cmd_keyword, "uname", &program::rpn_uname, "show rpn complete identification string" },
     { cmd_keyword, "history", &program::rpn_history, "see commands history" },
 
-    //USUAL OPERATIONS ON REALS AND COMPLEXEXE
+    //USUAL OPERATIONS ON REALS AND COMPLEXES
     { cmd_undef, "", NULL, "\nUSUAL OPERATIONS ON REALS AND COMPLEXES"},
     { cmd_keyword, "+", &program::rpn_plus, "addition" },
     { cmd_keyword, "-", &program::rpn_minus, "substraction" },