diff --git a/.ipynb_checkpoints/Untitled-checkpoint.ipynb b/.ipynb_checkpoints/Untitled-checkpoint.ipynb
new file mode 100644
index 0000000..4c7347e
--- /dev/null
+++ b/.ipynb_checkpoints/Untitled-checkpoint.ipynb
@@ -0,0 +1,48 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "d5741a3b-45f6-457c-8b2c-9425b0177023",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "2"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "1+1"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f0564c86-d8c1-4f96-a69d-8eec50ccd9ff",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "jp-Babel (Node.js)",
+   "language": "babel",
+   "name": "babel"
+  },
+  "language_info": {
+   "file_extension": ".js",
+   "mimetype": "application/javascript",
+   "name": "javascript",
+   "version": "17.9.0"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/.ipynb_checkpoints/qs-checkpoint.ipynb b/.ipynb_checkpoints/qs-checkpoint.ipynb
new file mode 100644
index 0000000..e2bb1ac
--- /dev/null
+++ b/.ipynb_checkpoints/qs-checkpoint.ipynb
@@ -0,0 +1,198 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "e28a05ae-c5c5-4dc5-88b4-9090492f13e2",
+   "metadata": {},
+   "source": [
+    "# qs\n",
+    "- A querystring parsing and stringifying library with some added security.\n",
+    "- [https://www.npmjs.com/package/qs](https://www.npmjs.com/package/qs)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "a1d79a6e-3479-41cc-bc94-bd4d5b55e788",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{ a: 'b', c: 'd' }"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "qs.parse('?a=b&c=d', { ignoreQueryPrefix: true })"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "b6a27923-d70c-4403-b977-9d3901a9c204",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "/admin/reginfo?id=123&regId=456&category=789\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "undefined"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "const item = {id:123,regId:456,category:789}\n",
+    "const url = `/admin/reginfo?${qs.stringify(item)}`\n",
+    "console.log(url)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "0425adb4-a182-47a5-8fc2-8df4815069eb",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{ a: 'b' }"
+      ]
+     },
+     "execution_count": 8,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "qs.parse('a=b&c=d', { parameterLimit: 1 });"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "f7f2490d-52b3-41c8-a19f-d6be53095d09",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{ a: 'b', c: 'd' }"
+      ]
+     },
+     "execution_count": 13,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "qs.parse('?a=b&c=d', { ignoreQueryPrefix: true })"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "id": "a317f8a9-6944-47f5-99b8-9cabac49608e",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{ a: 'b', c: 'd' }"
+      ]
+     },
+     "execution_count": 15,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "qs.parse('a=b;c=d', { delimiter: ';' })"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "id": "da3327c1-6146-43f5-9301-dd066170ec53",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{ a: 'b', c: 'd', e: 'f' }"
+      ]
+     },
+     "execution_count": 17,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "qs.parse('a=b;c=d,e=f', { delimiter: /[;,]/ })"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "id": "c32e7427-7d1a-4f0d-a84f-b20403290883",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "undefined"
+      ]
+     },
+     "execution_count": 18,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "var qs = require('qs');\n",
+    "var assert = require('assert');\n",
+    "\n",
+    "var obj = qs.parse('a=c');\n",
+    "assert.deepEqual(obj, { a: 'c' });\n",
+    "\n",
+    "var str = qs.stringify(obj);\n",
+    "assert.equal(str, 'a=c');\n"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "jp-Babel (Node.js)",
+   "language": "babel",
+   "name": "babel"
+  },
+  "language_info": {
+   "file_extension": ".js",
+   "mimetype": "application/javascript",
+   "name": "javascript",
+   "version": "17.9.0"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/Untitled.ipynb b/Untitled.ipynb
new file mode 100644
index 0000000..4c7347e
--- /dev/null
+++ b/Untitled.ipynb
@@ -0,0 +1,48 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "d5741a3b-45f6-457c-8b2c-9425b0177023",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "2"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "1+1"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f0564c86-d8c1-4f96-a69d-8eec50ccd9ff",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "jp-Babel (Node.js)",
+   "language": "babel",
+   "name": "babel"
+  },
+  "language_info": {
+   "file_extension": ".js",
+   "mimetype": "application/javascript",
+   "name": "javascript",
+   "version": "17.9.0"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/qs.ipynb b/qs.ipynb
new file mode 100644
index 0000000..e2bb1ac
--- /dev/null
+++ b/qs.ipynb
@@ -0,0 +1,198 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "e28a05ae-c5c5-4dc5-88b4-9090492f13e2",
+   "metadata": {},
+   "source": [
+    "# qs\n",
+    "- A querystring parsing and stringifying library with some added security.\n",
+    "- [https://www.npmjs.com/package/qs](https://www.npmjs.com/package/qs)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "a1d79a6e-3479-41cc-bc94-bd4d5b55e788",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{ a: 'b', c: 'd' }"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "qs.parse('?a=b&c=d', { ignoreQueryPrefix: true })"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "b6a27923-d70c-4403-b977-9d3901a9c204",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "/admin/reginfo?id=123&regId=456&category=789\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "undefined"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "const item = {id:123,regId:456,category:789}\n",
+    "const url = `/admin/reginfo?${qs.stringify(item)}`\n",
+    "console.log(url)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "0425adb4-a182-47a5-8fc2-8df4815069eb",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{ a: 'b' }"
+      ]
+     },
+     "execution_count": 8,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "qs.parse('a=b&c=d', { parameterLimit: 1 });"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "f7f2490d-52b3-41c8-a19f-d6be53095d09",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{ a: 'b', c: 'd' }"
+      ]
+     },
+     "execution_count": 13,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "qs.parse('?a=b&c=d', { ignoreQueryPrefix: true })"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "id": "a317f8a9-6944-47f5-99b8-9cabac49608e",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{ a: 'b', c: 'd' }"
+      ]
+     },
+     "execution_count": 15,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "qs.parse('a=b;c=d', { delimiter: ';' })"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "id": "da3327c1-6146-43f5-9301-dd066170ec53",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{ a: 'b', c: 'd', e: 'f' }"
+      ]
+     },
+     "execution_count": 17,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import qs from \"qs\"\n",
+    "qs.parse('a=b;c=d,e=f', { delimiter: /[;,]/ })"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "id": "c32e7427-7d1a-4f0d-a84f-b20403290883",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "undefined"
+      ]
+     },
+     "execution_count": 18,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "var qs = require('qs');\n",
+    "var assert = require('assert');\n",
+    "\n",
+    "var obj = qs.parse('a=c');\n",
+    "assert.deepEqual(obj, { a: 'c' });\n",
+    "\n",
+    "var str = qs.stringify(obj);\n",
+    "assert.equal(str, 'a=c');\n"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "jp-Babel (Node.js)",
+   "language": "babel",
+   "name": "babel"
+  },
+  "language_info": {
+   "file_extension": ".js",
+   "mimetype": "application/javascript",
+   "name": "javascript",
+   "version": "17.9.0"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}