diff --git a/src/apis/proc b/src/apis/proc
new file mode 100644
index 0000000..c2555ec
--- /dev/null
+++ b/src/apis/proc
@@ -0,0 +1,57 @@
+-- "multitasking"
+local _proc = {}
+local _killProc = {}
+function signal(pid, sig)
+  local p = _proc[pid]
+  if p then
+    if not p.filter or p.filter == "signal" then
+      local ok, rtn = coroutine.resume(p.co, "signal", tostring(sig))
+      if ok then
+        p.filter = rtn
+      end
+    end
+    return true
+  end
+  return false
+end
+function kill(pid)
+  _killProc[pid] = true
+end
+function launch(fn, name)
+  _proc[#_proc + 1] = {
+    name = name or "lua",
+    co = coroutine.create(setfenv(fn, getfenv())),
+  }
+  return true
+end
+function getInfo()
+  local t = {}
+  for pid, v in pairs(_proc) do
+    t[pid] = v.name
+  end
+  return t
+end
+
+function run()
+  os.queueEvent("multitask")
+  while _proc[1] ~= nil do
+    local ev = {os.pullEventRaw()}
+    for pid, v in pairs(_proc) do
+      if not v.filter or ev[1] == "terminate" or v.filter == ev[1] then
+        local ok, rtn = coroutine.resume(v.co, unpack(ev))
+        if ok then
+          v.filter = rtn
+        end
+      end
+      if coroutine.status(v.co) == "dead" then
+        _killProc[pid] = true
+      end
+    end
+    for pid in pairs(_killProc) do
+      _proc[pid] = nil
+    end
+    if next(_killProc) then
+      _killProc = {}
+    end
+  end
+end