diff --git a/artiq/management/scheduler.py b/artiq/management/scheduler.py
index c415ecc0e..d97a42efd 100644
--- a/artiq/management/scheduler.py
+++ b/artiq/management/scheduler.py
@@ -1,4 +1,5 @@
 import asyncio
+from time import time
 
 from artiq.management.worker import Worker
 
@@ -6,9 +7,16 @@ from artiq.management.worker import Worker
 class Scheduler:
     def __init__(self, *args, **kwargs):
         self.worker = Worker(*args, **kwargs)
+        self.currently_executing = None
+        self.next_rid = 0
         self.queued = []
         self.queue_count = asyncio.Semaphore(0)
 
+    def new_rid(self):
+        r = self.next_rid
+        self.next_rid += 1
+        return r
+
     @asyncio.coroutine
     def start(self):
         self.task = asyncio.Task(self._schedule())
@@ -22,13 +30,41 @@ class Scheduler:
         yield from self.worker.end_process()
 
     def run_once(self, run_params, timeout):
-        self.queued.append((run_params, timeout))
+        rid = self.new_rid()
+        self.queued.append((rid, run_params, timeout))
         self.queue_count.release()
+        return rid
+
+    def cancel_once(self, rid):
+        idx = next(idx for idx, (qrid, _, _) in enumerate(self.queued)
+                   if qrid == rid)
+        del self.queued[idx]
+
+    def get_schedule(self):
+        if self.currently_executing is None:
+            ce = None
+        else:
+            rid, run_params, timeout, t = self.currently_executing
+            ce = rid, run_params, timeout, time() - t
+        return ce, self.queued
+
+    def run_periodic(self, run_params, timeout, period):
+        raise NotImplementedError
+
+    def cancel_periodic(self, prid):
+        raise NotImplementedError
+
+    @asyncio.coroutine
+    def _run(self, rid, run_params, timeout):
+        self.currently_executing = rid, run_params, timeout, time()
+        result = yield from self.worker.run(run_params, timeout)
+        self.currently_executing = None
+        return result
 
     @asyncio.coroutine
     def _schedule(self):
         while True:
             yield from self.queue_count.acquire()
-            run_params, timeout = self.queued.pop(0)
-            result = yield from self.worker.run(run_params, timeout)
-            print(result)
+            rid, run_params, timeout = self.queued.pop(0)
+            result = yield from self._run(rid, run_params, timeout)
+            print(rid, result)
diff --git a/frontend/artiq_client.py b/frontend/artiq_client.py
index a75f1f260..6d81c2ca6 100755
--- a/frontend/artiq_client.py
+++ b/frontend/artiq_client.py
@@ -2,6 +2,8 @@
 
 import argparse
 
+from prettytable import PrettyTable
+
 from artiq.management.pc_rpc import Client
 
 
@@ -15,8 +17,9 @@ def _get_args():
         help="TCP port to use to connect to the master")
 
     subparsers = parser.add_subparsers(dest="action")
+    subparsers.required = True
 
-    parser_add = subparsers.add_parser("add", help="add an experiment")
+    parser_add = subparsers.add_parser("submit", help="submit an experiment")
     parser_add.add_argument(
         "-p", "--periodic", default=None, type=float,
         help="run the experiment periodically every given number of seconds")
@@ -29,23 +32,70 @@ def _get_args():
                             help="unit to run")
     parser_add.add_argument("file", help="file containing the unit to run")
 
+
+    parser_cancel = subparsers.add_parser("cancel",
+                                          help="cancel an experiment")
+    parser_cancel.add_argument("-p", "--periodic", default=False,
+                               action="store_true",
+                               help="cancel a periodic experiment")
+    parser_cancel.add_argument("rid", type=int,
+                               help="run identifier (RID/PRID)")
+
+    parser_show = subparsers.add_parser("show",
+                                        help="show the experiment schedule")
+
     return parser.parse_args()
 
 
+def _action_submit(remote, args):
+    run_params = {
+        "file": args.file,
+        "unit": args.unit,
+        "function": args.function
+    }
+    if args.periodic is None:
+        rid = remote.run_once(run_params, args.timeout)
+        print("RID: {}".format(rid))
+    else:
+        prid = remote.run_periodic(run_params, args.timeout,
+                                   args.periodic)
+        print("PRID: {}".format(prid))
+
+
+def _action_cancel(remote, args):
+    if args.periodic:
+        remote.cancel_periodic(args.rid)
+    else:
+        remote.cancel_once(args.rid)
+
+
+def _action_show(remote, args):
+    ce, queue = remote.get_schedule()
+    if ce is None and not queue:
+        print("Queue is empty")
+    else:
+        table = PrettyTable(["RID", "File", "Unit", "Function", "Timeout"])
+        if ce is not None:
+            rid, run_params, timeout, t = ce
+            print("Currently executing RID {} for {:.1f}s".format(rid, t))
+            row = [rid, run_params["file"]]
+            for x in run_params["unit"], run_params["function"], timeout:
+                row.append("-" if x is None else x)
+            table.add_row(row)
+        for rid, run_params, timeout in queue:
+            row = [rid, run_params["file"]]
+            for x in run_params["unit"], run_params["function"], timeout:
+                row.append("-" if x is None else x)
+            table.add_row(row)
+        print("Run queue:")
+        print(table)
+
+
 def main():
     args = _get_args()
     remote = Client(args.server, args.port, "master")
     try:
-        if args.action == "add":
-            if args.periodic is None:
-                remote.run_once(
-                    {
-                        "file": args.file,
-                        "unit": args.unit,
-                        "function": args.function
-                    }, args.timeout)
-            else:
-                raise NotImplementedError
+        globals()["_action_" + args.action](remote, args)
     finally:
         remote.close_rpc()
 
diff --git a/setup.py b/setup.py
index 94d9f4cf4..16a252225 100755
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf8 -*-
 
 from setuptools import setup, find_packages
 from glob import glob
@@ -16,7 +15,7 @@ setup(
     long_description = open("README.rst").read(),
     license = "BSD",
     install_requires = [
-        "sphinx", "numpy", "scipy"
+        "sphinx", "numpy", "scipy", "prettytable"
     ],
     extras_require = {},
     dependency_links = [],