diff --git a/assets/disk0/tvdos/bin/hexdump.js b/assets/disk0/tvdos/bin/hexdump.js
index 2e81064..c19eead 100644
--- a/assets/disk0/tvdos/bin/hexdump.js
+++ b/assets/disk0/tvdos/bin/hexdump.js
@@ -1,14 +1,27 @@
-if (exec_args[1] === undefined) {
-    printerrln("Usage: hexdump <file>")
-    return 1;
+let filename = exec_args[1]
+let fileContent = undefined
+if (filename === undefined && _G.shell.hasPipe()) {
+    fileContent = _G.shell.getPipe()
+}
+else if (filename === undefined) {
+    println('Missing filename ("hexdump -?" for help)');
+    return 0;
+}
+else {
+    if (filename.startsWith("-?")) {
+        println("hexdump <filename>");
+        return 0;
+    }
+
+    let file = files.open(`${_G.shell.getCurrentDrive()}:/${_G.shell.resolvePathInput(filename).string}`)
+    if (!file.exists) {
+        printerrln(_G.shell.resolvePathInput(filename).string+": cannot open");
+        return 1;
+    }
+
+    fileContent = file.sread()
 }
 
-let file = files.open(`${_G.shell.getCurrentDrive()}:/${_G.shell.resolvePathInput(exec_args[1]).string}`)
-if (!file.exists) {
-    printerrln(_G.shell.resolvePathInput(exec_args[1]).string+": cannot open");
-    return 1;
-}
-let fileContent = file.sread()
 
 for (let k = 0; k < fileContent.length; k += 16) {
     for (let i = 0; i < 16; i++) {
diff --git a/doc/implementation.tex b/doc/implementation.tex
index 0a39b55..2813f62 100644
--- a/doc/implementation.tex
+++ b/doc/implementation.tex
@@ -25,6 +25,7 @@ Your Javascript program is stored into the Program Memory, and since its capacit
 \1\inlinesynopsis[Array]{init}{}{returns the subarray that omits the \emph{last} element.}
 \1\inlinesynopsis[Array]{sum}{selector}{returns the sum of the elements of the array. Selector is optionally defined to indicate how the value must be transformed to obtain the sum.}
 \1\inlinesynopsis[Array]{max}{selector}{returns the maximum among the elements of the array. Selector is optionally defined to indicate how the value must be transformed to obtain the max.}
+\1\inlinesynopsis[String]{trimNull}{}{trims null characters at the \emph{end} of the string.}
 \end{outline}
 
 
diff --git a/doc/tsvmman.idx b/doc/tsvmman.idx
index 918904d..0526528 100644
--- a/doc/tsvmman.idx
+++ b/doc/tsvmman.idx
@@ -18,11 +18,11 @@
 \indexentry{graphics (library)|hyperpage}{26}
 \indexentry{MMIO-graphics|hyperpage}{26}
 \indexentry{boot process|hyperpage}{29}
-\indexentry{commands (DOS)|hyperpage}{30}
 \indexentry{coreutils (DOS)|hyperpage}{30}
-\indexentry{pipe (DOS)|hyperpage}{32}
-\indexentry{filesystem (DOS)|hyperpage}{34}
-\indexentry{file descriptor (DOS)|hyperpage}{34}
-\indexentry{device file|hyperpage}{36}
-\indexentry{input (DOS)|hyperpage}{38}
-\indexentry{gl (DOS)|hyperpage}{39}
+\indexentry{applications (DOS)|hyperpage}{31}
+\indexentry{pipe (DOS)|hyperpage}{33}
+\indexentry{filesystem (DOS)|hyperpage}{35}
+\indexentry{file descriptor (DOS)|hyperpage}{35}
+\indexentry{device file|hyperpage}{37}
+\indexentry{input (DOS)|hyperpage}{39}
+\indexentry{gl (DOS)|hyperpage}{40}
diff --git a/doc/tsvmman.ilg b/doc/tsvmman.ilg
index 236050f..30850bc 100644
--- a/doc/tsvmman.ilg
+++ b/doc/tsvmman.ilg
@@ -1,6 +1,6 @@
 This is makeindex, version 2.16 [TeX Live 2022] (kpathsea + Thai support).
 Scanning input file tsvmman.idx....done (28 entries accepted, 0 rejected).
-Sorting entries....done (138 comparisons).
-Generating output file tsvmman.ind....done (58 lines written, 0 warnings).
+Sorting entries....done (137 comparisons).
+Generating output file tsvmman.ind....done (61 lines written, 0 warnings).
 Output written in tsvmman.ind.
 Transcript written in tsvmman.ilg.
diff --git a/doc/tsvmman.ind b/doc/tsvmman.ind
index e88fcbe..e700d6f 100644
--- a/doc/tsvmman.ind
+++ b/doc/tsvmman.ind
@@ -1,5 +1,9 @@
 \begin{theindex}
 
+  \item applications (DOS), \hyperpage{31}
+
+  \indexspace
+
   \item base64 (library), \hyperpage{13}
   \item block communication, \hyperpage{16}
   \item boot process, \hyperpage{29}
@@ -9,29 +13,28 @@
   \item code page, \hyperpage{22}
   \item colour palette, \hyperpage{24}
   \item com (library), \hyperpage{16}
-  \item commands (DOS), \hyperpage{30}
   \item con (library), \hyperpage{9}
   \item console (library), \hyperpage{9}
   \item coreutils (DOS), \hyperpage{30}
 
   \indexspace
 
-  \item device file, \hyperpage{36}
+  \item device file, \hyperpage{37}
 
   \indexspace
 
-  \item file descriptor (DOS), \hyperpage{34}
-  \item filesystem (DOS), \hyperpage{34}
+  \item file descriptor (DOS), \hyperpage{35}
+  \item filesystem (DOS), \hyperpage{35}
 
   \indexspace
 
-  \item gl (DOS), \hyperpage{39}
+  \item gl (DOS), \hyperpage{40}
   \item graphics (library), \hyperpage{26}
   \item gzip (library), \hyperpage{12}
 
   \indexspace
 
-  \item input (DOS), \hyperpage{38}
+  \item input (DOS), \hyperpage{39}
 
   \indexspace
 
@@ -48,7 +51,7 @@
 
   \indexspace
 
-  \item pipe (DOS), \hyperpage{32}
+  \item pipe (DOS), \hyperpage{33}
 
   \indexspace
 
diff --git a/doc/tvdos.tex b/doc/tvdos.tex
index f957582..30b229e 100644
--- a/doc/tvdos.tex
+++ b/doc/tvdos.tex
@@ -30,9 +30,9 @@ Variables can be set or changed using \textbf{SET} commands.
 
 
 
-\chapter{DOS Commands}
+\chapter{Coreutils}
 
-\index{commands (DOS)}\index{coreutils (DOS)}DOS commands are only valid under the DOS environment.
+\index{coreutils (DOS)}Coreutils are the core ``commands'' of \thedos.
 
 \begin{outline}
 \1\dossynopsis{cat}{file}{Reads a file and pipes its contents to the pipe, or to the console if no pipes are specified.}
@@ -52,7 +52,28 @@ Variables can be set or changed using \textbf{SET} commands.
 
 
 
-\chapter{Using DOS Utils on JS}
+\chapter{Applications}
+
+\index{applications (DOS)}Applications are the programs shiped with the standard distribution of \thedos\ that is written for users' convenience.
+
+This chapter will only briefly list and describe the applications.
+
+\begin{outline}
+\1\dossynopsis{basica}{Invokens a BASIC interpreter stored in the ROM. If no BASIC rom is present, nothing will be done.}
+\1\dossynopsis{color}{Changes the background and the foreground of the active session.}
+\1\dossynopsis{command}{The default text-based DOS shell. Call with \code{command /fancy} for more \ae sthetically pleasing looks.}
+\1\dossynopsis{edit}{path}{The interactive full-screen text editor.}
+\1\dossynopsis{false}{Returns errorlevel 1 upon execution.}
+\1\dossynopsis{hexdump}{path}{Prints out the contents of a file in hexadecimal view. Supports pipe.}
+\1\dossynopsis{less}{path}{Allows user to read the long text, even if they are wider and/or taller than the screen. Supports pipe.}
+\1\dossynopsis{printfile}{path}{Prints out the contents of a textfile with line numbers. Useful for making descriptive screenshots.}
+\1\dossynopsis{touch}{path}{Updates a file's modification date. New file will be created if the specified file does not exist.}
+\1\dossynopsis{true}{Returns errorlevel 0 upon execution.}
+\end{outline}
+
+
+
+\chapter{Invoking Coreutils on JS}
 
 DOS coreutils and some of the internal functions can be used on Javascript program.