diff --git a/lib/get_answer.py b/lib/get_answer.py
index babf8ed..d79eabf 100644
--- a/lib/get_answer.py
+++ b/lib/get_answer.py
@@ -37,7 +37,6 @@ MAX_SEARCH_LEN = 20
 
 INTERNAL_TOPICS = [
     ':cht.sh',
-    ':cht.sh-posix',
     ':bash_completion',
     ':emacs',
     ':emacs-ivy',
diff --git a/share/cht.sh-posix.txt b/share/cht.sh-posix.txt
deleted file mode 100755
index 7ed1b7c..0000000
--- a/share/cht.sh-posix.txt
+++ /dev/null
@@ -1,428 +0,0 @@
-#!/bin/sh
-#
-# [X] open section
-# [X] one shot mode
-# [X] usage info
-# [X] dependencies check
-# [X] help
-# [X] yank/y/copy/c
-# [X] Y/C
-# [X] eof problem
-# [X] more
-# [X] stealth mode
-#
-# here are several examples for the stealth mode:
-#
-# zip lists
-# list permutation
-# random list element
-# reverse a list
-# read json from file
-# append string to a file
-# run process in background
-# count words in text counter
-# group elements list
-
-__CHTSH_VERSION=4
-__CHTSH_DATETIME="2018-07-08 22:26:46 +0200"
-
-export LESSSECURE=1
-STEALTH_MAX_SELECTION_LENGTH=5
-
-case "$OSTYPE" in
-  darwin*) is_macos=yes ;;
-  *) is_macos=no ;;
-esac
-
-# for KSH93
-if echo $KSH_VERSION | grep -q ' 93' && ! local foo 2>/dev/null; then
-  alias local=typeset
-fi
-
-get_query_options()
-{
-  local query="$*"
-  if [ -n "$CHTSH_QUERY_OPTIONS" ]; then
-    case $query in
-      *\?*)   query="$query&${CHTSH_QUERY_OPTIONS}";;
-      *)      query="$query?${CHTSH_QUERY_OPTIONS}";;
-    esac
-  fi
-  printf "%s" "$query"
-}
-
-do_query()
-{
-  local query="$*"
-  local b_opts=
-  local uri="https://cht.sh/\"\$(get_query_options $query)\""
-
-  if [ -e "$HOME/.cht.sh/id" ]; then
-    b_opts="-b \"\$HOME/.cht.sh/id\""
-  fi
-
-  eval curl $b_opts -s $uri > "$TMP1"
-
-  if [ -z "$lines" ] || [ "$(wc -l "$TMP1" | awk '{print $1}')" -lt "$lines" ]; then
-    cat "$TMP1"
-  else
-    ${PAGER:-$defpager} "$TMP1"
-  fi
-}
-
-prepare_query()
-{
-  local section="$1"; shift
-  local input="$1"; shift
-  local arguments="$1"
-
-  local query
-  if [ -z "$section" ] || [ x"${input}" != x"${input#/}" ]; then
-    query=$(printf %s "$input" | sed 's@ @/@; s@ @+@g')
-  else
-    query=$(printf %s "$section/$input" | sed 's@ @+@g')
-  fi
-
-  [ -n "$arguments" ] && arguments="?$arguments"
-  printf %s "$query$arguments"
-}
-
-get_list_of_sections()
-{
-  curl -s https://cht.sh/:list | grep -v '/.*/' | grep '/$' | xargs
-}
-
-gen_random_str()
-(
-  len=$1
-  if command -v openssl >/dev/null; then
-    openssl rand -base64 $(($len*3/4)) | awk -v ORS='' //
-  else
-    rdev=/dev/urandom
-    for d in /dev/{srandom,random,arandom}; do
-      test -r $d && rdev=$d
-    done
-    if command -v hexdump >/dev/null; then
-      hexdump -vn $(($len/2)) -e '1/1 "%02X" 1 ""' $rdev
-    elif command -v xxd >/dev/null; then
-      xxd -l $(($len/2)) -ps $dev | awk -v ORS='' //
-    else
-      cd /tmp
-      s=
-      while [ $(echo "$s" | wc -c) -lt $len ]; do
-        s="$s$(mktemp -u XXXXXXXXXX)"
-      done
-      printf %.${len}s "$s"
-    fi
-  fi
-)
-
-if [ -e "$HOME"/.cht.sh/cht.sh.conf ]; then
-  # shellcheck disable=SC1090,SC2002
-  . "$HOME"/.cht.sh/cht.sh.conf
-fi
-
-if [ "$1" = --read ]; then
-  read -r a || a=exit
-  printf "%s\n" "$a"
-  exit 0
-elif [ x"$1" = x--help ] || [ -z "$1" ]; then
-  cat <<EOF
-Usage:
-
-    ${0##*/} --help           show this help
-    ${0##*/} --shell [LANG]   shell mode (open LANG if specified)
-    ${0##*/} QUERY            process QUERY and exit
-EOF
-  exit 0
-elif [ x"$1" = x--shell ]; then
-  shell_mode=yes
-  shift
-fi
-
-prompt="cht.sh"
-
-prompt="cht.sh"
-opts=""
-input=""
-for o; do
-  if [ x"$o" != x"${o#-}" ]; then
-    opts="${opts}${o#-}"
-  else
-    input="$input $o"
-  fi
-done
-query=$(echo "$input" | sed 's@ *$@@; s@^ *@@; s@ @/@; s@ @+@g')
-
-if [ "$shell_mode" != yes ]; then
-  curl -s https://cht.sh/"$(get_query_options "$query")"
-  exit 0
-else
-  new_section="$1"
-  valid_sections=$(get_list_of_sections)
-  valid=no; for q in $valid_sections; do [ "$q" = "$new_section/" ] && { valid=yes; break; }; done
-
-  if [ "$valid" = yes ]; then
-    section="$new_section"
-    this_query="$(echo "$input" | sed 's@ *[^ ]* *@@')"
-    this_prompt="\033[0;32mcht.sh/$section>\033[0m "
-  else
-    this_query="$input"
-    this_prompt="\033[0;32mcht.sh>\033[0m "
-  fi
-  if [ -n "$this_query" ] && [ -z "$CHEATSH_RESTART" ]; then
-    printf "$this_prompt$this_query\n"
-    curl -s https://cht.sh/"$(get_query_options "$query")"
-  fi
-fi
-
-if [ "$is_macos" != yes ]; then
-  command -v xsel >/dev/null ||   echo 'DEPENDENCY: please install "xsel" for "copy"' >&2
-fi
-command -v rlwrap >/dev/null || { echo 'DEPENDENCY: install "rlwrap" to use cht.sh in the shell mode' >&2; exit 1; }
-command -v curl   >/dev/null || { echo 'DEPENDENCY: install "curl" to use cht.sh' >&2; exit 1; }
-
-mkdir -p "$HOME/.cht.sh/"
-lines=$(tput lines)
-
-if command -v less >/dev/null; then
-  defpager="less -R"
-elif command -v more >/dev/null; then 
-  defpager=more
-else
-  defpager=cat
-fi
-
-TMP1=$(mktemp /tmp/cht.sh.XXXXXXXXXXXXX)
-trap 'rm -f $TMP1 $TMP2' EXIT
-trap 'true' INT
-
-if ! [ -e "$HOME/.cht.sh/.hushlogin" ] && [ -z "$this_query" ]; then
-  echo "type 'help' for the cht.sh shell help"
-fi
-
-while true; do
-  if [ "$section" != "" ]; then
-    full_prompt="$prompt/$section> "
-  else
-    full_prompt="$prompt> "
-  fi
-
-  input=$(
-    rlwrap -H "$HOME/.cht.sh/history" -pgreen -C cht.sh -S "$full_prompt" sh "$0" --read | sed 's/ *#.*//'
-  )
-
-  case "$input" in
-    '?'|h|help)
-      cat <<EOF
-help    - show this help
-hush    - do not show the 'help' string at start anymore
-cd LANG - change the language context
-copy    - copy the last answer in the clipboard (aliases: yank, y, c)
-ccopy   - copy the last answer w/o comments (cut comments; aliases: cc, Y, C)
-exit    - exit the cheat shell (aliases: quit, ^D)
-id [ID] - set/show an unique session id ("reset" to reset, "remove" to remove)
-stealth - stealth mode (automatic queries for selected text)
-update  - self update (only if the scriptfile is writeable)
-version - show current cht.sh version
-/:help  - service help
-QUERY   - space ceparated query staring (examples are below)
-              cht.sh> python zip list
-              cht.sh/python> zip list
-              cht.sh/go> /python zip list
-EOF
-      continue
-      ;;
-    hush)
-      mkdir -p $HOME/.cht.sh/ && touch $HOME/.cht.sh/.hushlogin && echo "Initial 'use help' message was disabled"
-      continue
-      ;;
-    cd)
-      section=""
-      continue
-      ;;
-    "cd "*)
-      new_section=$(echo "$input" | sed 's/cd  *//; s@/*$@@; s@^/*@@')
-      if [ -z "$new_section" ] || [ ".." = "$new_section" ]; then
-        section=""
-      else
-        valid_sections=$(get_list_of_sections)
-        valid=no; for q in $valid_sections; do [ "$q" = "$new_section/" ] && { valid=yes; break; }; done
-        if [ "$valid" = no ]; then
-          echo "Invalid section: $new_section"
-          echo "Valid sections:"
-          echo $valid_sections | xargs printf "%-10s\n" | tr ' ' .  | xargs -n 10 | sed 's/\./ /g; s/^/  /'
-          continue
-        else
-          section="$new_section"
-        fi
-      fi
-      continue
-      ;;
-    exit|quit)
-      break
-      ;;
-    copy|yank|c|y)
-      if [ -z "$DISPLAY" ]; then
-        echo copy: supported only in the Desktop version
-        continue
-      fi
-      if [ -z "$input" ]; then
-        echo copy: Make at least one query first.
-        continue
-      else
-        curl -s https://cht.sh/"$(get_query_options "$query"?T)" > "$TMP1"
-        if [ "$is_macos" != yes ]; then
-          xsel -i < "$TMP1"
-        else
-          cat "$TMP1" | pbcopy
-        fi
-        echo "copy: $(wc -l "$TMP1" | awk '{print $1}') lines copied to the selection"
-        continue
-      fi
-      ;;
-    ccopy|cc|C|Y)
-      if [ -z "$DISPLAY" ]; then
-        echo copy: supported only in the Desktop version
-        continue
-      fi
-      if [ -z "$input" ]; then
-        echo copy: Make at least one query first.
-        continue
-      else
-        curl -s https://cht.sh/"$(get_query_options "$query"?TQ)" > "$TMP1"
-        if [ "$is_macos" != yes ]; then
-          xsel -i < "$TMP1"
-        else
-          cat "$TMP1" | pbcopy
-        fi
-        echo "copy: $(wc -l "$TMP1" | awk '{print $1}') lines copied to the selection"
-        continue
-      fi
-      ;;
-    id|"id "*)
-      id_file="$HOME/.cht.sh/id"
-
-      if [ id = "$input" ]; then
-        new_id=""
-      else
-        new_id=$(echo "$input" | sed 's/id  *//; s/ *$//; s/ /+/g')
-      fi
-      if [ "$new_id" = remove ]; then
-        if [ -e "$id_file" ]; then
-          rm -f -- "$id_file" && echo "id is removed"
-        else
-          echo "id was not set, so you can't remove it"
-        fi
-        continue
-      fi
-      if [ -n "$new_id" ] && [ reset != "$new_id" ] && [ $(/bin/echo -n "$new_id" | wc -c) -lt 16 ]; then
-        echo "ERROR: $new_id: Too short id. Minimal id length is 16. Use 'id reset' for a random id"
-        continue
-      fi
-      if [ -z "$new_id" ]; then
-        # if new_id is not specified check if we have some id already
-        # if yes, just show it
-        # if not, generate a new id
-        if [ -e "$id_file" ]; then
-          echo $(awk '$6 == "id" {print $NF}' <"$id_file" | tail -n 1)
-          continue
-        else
-          new_id=reset
-        fi
-      fi
-      if [ "$new_id" = reset ]; then
-        new_id=$(gen_random_str 12)
-      else
-        echo WARNING: if someone gueses your id, he can read your cht.sh search history
-      fi
-      if [ -e "$id_file" ] && grep -q '\tid\t[^\t][^\t]*$' "$id_file" 2> /dev/null; then
-        sed -i 's/\tid\t[^\t][^\t]*$/ id '"$new_id"'/' "$id_file"
-      else
-        if ! [ -e "$id_file" ]; then
-          printf '#\n\n' > "$id_file"
-        fi
-        printf ".cht.sh\tTRUE\t/\tTRUE\t0\tid\t$new_id\n" >> "$id_file"
-      fi
-      echo "$new_id"
-      continue
-      ;;
-    stealth|"stealth "*)
-        if [ "$input" != stealth ]; then
-          arguments=$(echo "$input" | sed 's/stealth //; s/ /\&/')
-        fi
-        trap break INT
-        if [ "$is_macos" = yes ]; then
-          past=$(pbpaste)
-        else
-          past=$(xsel -o)
-        fi
-        printf "\033[0;31mstealth:\033[0m you are in the stealth mode; select any text in any window for a query\n"
-        printf "\033[0;31mstealth:\033[0m selections longer than $STEALTH_MAX_SELECTION_LENGTH words are ignored\n"
-        if [ -n "$arguments" ]; then
-          printf "\033[0;31mstealth:\033[0m query arguments: ?$arguments\n"
-        fi
-        printf "\033[0;31mstealth:\033[0m use ^C to leave this mode\n"
-        while true; do
-          if [ "$is_macos" = yes ]; then
-            current=$(pbpaste)
-          else
-            current=$(xsel -o)
-          fi
-          if [ "$past" != "$current" ]; then
-            past=$current
-            current_text="$(echo $current | tr -c '[a-zA-Z0-9]' ' ')"
-            if [ $(echo $current_text | wc -w) -gt "$STEALTH_MAX_SELECTION_LENGTH" ]; then
-              echo "\033[0;31mstealth:\033[0m selection length is longer than $STEALTH_MAX_SELECTION_LENGTH words; ignoring"
-              continue
-            else
-              printf "\n\033[0;31mstealth: \033[7m $current_text\033[0m\n"
-              query=$(prepare_query "$section" "$current_text" "$arguments")
-              do_query "$query"
-            fi
-          fi
-          sleep 1;
-        done
-        trap - INT
-        continue
-      ;;
-    update)
-      [ -w "$0" ] || { echo "The script is readonly; please update manually: curl -s https://cht.sh/:bash | sudo tee $0"; continue; }
-      TMP2=$(mktemp /tmp/cht.sh.XXXXXXXXXXXXX)
-      curl -s https://cht.sh/:cht.sh > "$TMP2"
-      if ! cmp "$0" "$TMP2" > /dev/null 2>&1; then
-        if grep -q ^__CHTSH_VERSION= "$TMP2"; then
-          # section was vaildated by us already
-          args="--shell $section"
-          cp "$TMP2" "$0" && echo "Updated. Restarting..." && rm "$TMP2" && CHEATSH_RESTART=1 exec "$0" $args
-        else
-          echo "Something went wrong. Please update manually"
-        fi
-      else
-        echo "cht.sh is up to date. No update needed"
-      fi
-      rm -f "$TMP2" > /dev/null 2>&1
-      continue
-      ;;
-    version)
-      insttime=$(ls -l -- "$0" | sed 's/  */ /g' | cut -d ' ' -f 6-8)
-      echo "cht.sh version $__CHTSH_VERSION of $__CHTSH_DATETIME; installed at: $insttime"
-      TMP2=$(mktemp /tmp/cht.sh.XXXXXXXXXXXXX)
-      if curl -s https://cht.sh/:cht.sh > "$TMP2"; then
-        if ! cmp "$0" "$TMP2" > /dev/null 2>&1; then
-          echo "Update needed (type 'update' for that)".
-        else
-          echo "Up to date. No update needed"
-        fi
-      fi
-      rm -f "$TMP2" > /dev/null 2>&1
-      continue
-      ;;
-    "")
-      continue
-      ;;
-  esac
-
-  query=$(prepare_query "$section" "$input")
-  do_query "$query"
-done