diff --git a/Cargo.lock b/Cargo.lock
index b1694b1..e4d74af 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -70,11 +70,24 @@ name = "copyrat"
 version = "0.1.0"
 dependencies = [
  "clap",
+ "duct",
  "regex",
  "sequence_trie",
  "termion",
 ]
 
+[[package]]
+name = "duct"
+version = "0.13.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fc6a0a59ed0888e0041cf708e66357b7ae1a82f1c67247e1f93b5e0818f7d8d"
+dependencies = [
+ "libc",
+ "once_cell",
+ "os_pipe",
+ "shared_child",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.9.1"
@@ -133,6 +146,22 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8f8bdf33df195859076e54ab11ee78a1b208382d3a26ec40d142ffc1ecc49ef"
 
+[[package]]
+name = "once_cell"
+version = "1.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af8b08b04175473088b46763e51ee54da5f9a164bc162f615b91bc179dbf15a3"
+
+[[package]]
+name = "os_pipe"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb233f06c2307e1f5ce2ecad9f8121cffbbee2c95428f44ea85222e460d0d213"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "os_str_bytes"
 version = "2.4.0"
@@ -222,6 +251,16 @@ version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ee22067b7ccd072eeb64454b9c6e1b33b61cd0d49e895fd48676a184580e0c3"
 
+[[package]]
+name = "shared_child"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6be9f7d5565b1483af3e72975e2dee33879b3b86bd48c0929fccf6585d79e65a"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "strsim"
 version = "0.10.0"
diff --git a/Cargo.toml b/Cargo.toml
index 61b4148..8020aab 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,6 +13,7 @@ termion = "1.5"
 regex = "1.4"
 clap = { version = "3.0.0-beta.2", features = ["suggestions", "color", "wrap_help"]}
 sequence_trie = "0.3.6"
+duct = "0.13"
 
 [[bin]]
 name = "copyrat"
@@ -20,4 +21,4 @@ path = "src/main.rs"
 
 [[bin]]
 name = "tmux-copyrat"
-path = "src/bridge.rs"
+path = "src/tmux_copyrat.rs"
diff --git a/src/lib.rs b/src/lib.rs
index 6ed2448..57527ac 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,8 +7,10 @@ pub mod alphabets;
 pub mod colors;
 pub mod error;
 pub mod model;
+pub mod output_destination;
 pub mod process;
 pub mod regexes;
+pub mod selection;
 pub mod ui;
 
 /// Run copyrat on an input string `buffer`, configured by `Opt`.
@@ -16,7 +18,7 @@ pub mod ui;
 /// # Note
 ///
 /// Maybe the decision to take ownership of the buffer is a bit bold.
-pub fn run(buffer: String, opt: &CliOpt) -> Option<(String, bool)> {
+pub fn run(buffer: String, opt: &CliOpt) -> Option<selection::Selection> {
     let mut model = model::Model::new(
         &buffer,
         &opt.alphabet,
@@ -39,11 +41,14 @@ pub fn run(buffer: String, opt: &CliOpt) -> Option<(String, bool)> {
         },
     };
 
-    let selection: Option<(String, bool)> = {
+    let default_output_destination = output_destination::OutputDestination::Tmux;
+
+    let selection: Option<selection::Selection> = {
         let mut ui = ui::Ui::new(
             &mut model,
             opt.unique_hint,
             opt.focus_wrap_around,
+            default_output_destination,
             &opt.colors,
             &opt.hint_alignment,
             hint_style,
diff --git a/src/main.rs b/src/main.rs
index ad08248..5f8eeb6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,7 +3,7 @@ use std::fs::OpenOptions;
 use std::io::prelude::*;
 use std::io::{self, Read};
 
-use copyrat::{run, CliOpt};
+use copyrat::{run, selection::Selection, CliOpt};
 
 fn main() {
     let opt = CliOpt::parse();
@@ -17,14 +17,14 @@ fn main() {
 
     // Execute copyrat over the buffer (will take control over stdout).
     // This returns the selected matche.
-    let selection: Option<(String, bool)> = run(buffer, &opt);
+    let selection: Option<Selection> = run(buffer, &opt);
 
     // Early exit, signaling no selections were found.
     if selection.is_none() {
         std::process::exit(1);
     }
 
-    let (text, _) = selection.unwrap();
+    let Selection { text, .. } = selection.unwrap();
 
     // Write output to a target_path if provided, else print to original stdout.
     match opt.target_path {
diff --git a/src/output_destination.rs b/src/output_destination.rs
new file mode 100644
index 0000000..e6fdbe9
--- /dev/null
+++ b/src/output_destination.rs
@@ -0,0 +1,30 @@
+use std::fmt;
+
+/// Describes the type of buffer the selected should be copied to: either a
+/// tmux buffer or the system clipboard.
+#[derive(Clone)]
+pub enum OutputDestination {
+    /// The selection will be copied to the tmux buffer.
+    Tmux,
+    /// The selection will be copied to the system clipboard.
+    Clipboard,
+}
+
+impl OutputDestination {
+    /// Toggle between the variants of `OutputDestination`.
+    pub fn toggle(&mut self) {
+        match *self {
+            Self::Tmux => *self = Self::Clipboard,
+            Self::Clipboard => *self = Self::Tmux,
+        }
+    }
+}
+
+impl fmt::Display for OutputDestination {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Tmux => write!(f, "tmux"),
+            Self::Clipboard => write!(f, "clipboard"),
+        }
+    }
+}
diff --git a/src/selection.rs b/src/selection.rs
new file mode 100644
index 0000000..bac4697
--- /dev/null
+++ b/src/selection.rs
@@ -0,0 +1,7 @@
+use crate::output_destination::OutputDestination;
+
+pub struct Selection {
+    pub text: String,
+    pub uppercased: bool,
+    pub output_destination: OutputDestination,
+}
diff --git a/src/bridge.rs b/src/tmux_copyrat.rs
similarity index 63%
rename from src/bridge.rs
rename to src/tmux_copyrat.rs
index faebe5b..3b05e08 100644
--- a/src/bridge.rs
+++ b/src/tmux_copyrat.rs
@@ -2,7 +2,7 @@ use clap::Clap;
 use std::collections::HashMap;
 use std::str::FromStr;
 
-use copyrat::{error, process, CliOpt};
+use copyrat::{error, output_destination::OutputDestination, selection::Selection, CliOpt};
 
 mod tmux;
 
@@ -31,6 +31,13 @@ struct BridgeOpt {
     #[clap(long, arg_enum, default_value = "visible-area")]
     capture_region: tmux::CaptureRegion,
 
+    /// Name of the copy-to-clipboard executable.
+    ///
+    /// If the output destination is set to keyboard, copyrat will pipe the
+    /// selected text to this executable.
+    #[clap(long, default_value = "pbcopy")]
+    clipboard_exe: String,
+
     // Include CLI Options
     #[clap(flatten)]
     cli_options: CliOpt,
@@ -77,28 +84,50 @@ fn main() -> Result<(), error::ParseError> {
 
     let buffer = tmux::capture_pane(&active_pane, &opt.capture_region)?;
 
-    // We have to dance a little with Panes, because this process i/o streams
+    // We have to dance a little with Panes, because this process' i/o streams
     // are connected to the pane in the window newly created for us, instead
     // of the active current pane.
     let temp_pane_spec = format!("{}.0", opt.window_name);
     tmux::swap_pane_with(&temp_pane_spec)?;
 
-    let selections = copyrat::run(buffer, &opt.cli_options);
+    let selection = copyrat::run(buffer, &opt.cli_options);
 
     tmux::swap_pane_with(&temp_pane_spec)?;
 
     // Finally copy selection to a tmux buffer, and paste it to the active
     // buffer if it was uppercased.
 
-    match selections {
+    match selection {
         None => return Ok(()),
-        Some((text, uppercased)) => {
-            let args = vec!["set-buffer", &text];
-            process::execute("tmux", &args)?;
-
+        Some(Selection {
+            text,
+            uppercased,
+            output_destination,
+        }) => {
             if uppercased {
-                let args = vec!["paste-buffer", "-t", active_pane.id.as_str()];
-                process::execute("tmux", &args)?;
+                // let args = vec!["send-keys", "-t", active_pane.id.as_str(), &text];
+                // process::execute("tmux", &args)?;
+                duct::cmd!("tmux", "send-keys", "-t", active_pane.id.as_str(), &text).run()?;
+            }
+
+            match output_destination {
+                OutputDestination::Tmux => {
+                    // let args = vec!["set-buffer", &text];
+                    // process::execute("tmux", &args)?;
+                    duct::cmd!("tmux", "set-buffer", &text).run()?;
+
+                    // if uppercased {
+                    //     let args = vec!["paste-buffer", "-t", active_pane.id.as_str()];
+                    //     process::execute("tmux", &args)?;
+                    // }
+                }
+                OutputDestination::Clipboard => {
+                    // let args = [("echo", vec![&text[..]]), ("pbcopy", vec![])];
+                    // process::execute_piped(&args[..])?;
+                    duct::cmd!("echo", "-n", &text)
+                        .pipe(duct::cmd!(opt.clipboard_exe))
+                        .read()?;
+                }
             }
         }
     }
diff --git a/src/ui.rs b/src/ui.rs
index 1e35fbc..11ee285 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -8,7 +8,7 @@ use sequence_trie::SequenceTrie;
 use termion::{self, color, cursor, event, style};
 
 use crate::error::ParseError;
-use crate::{colors, model};
+use crate::{colors, model, output_destination::OutputDestination, process, selection::Selection};
 
 pub struct Ui<'a> {
     model: &'a mut model::Model<'a>,
@@ -18,6 +18,7 @@ pub struct Ui<'a> {
     lookup_trie: SequenceTrie<char, usize>,
     focus_index: usize,
     focus_wrap_around: bool,
+    default_output_destination: OutputDestination,
     rendering_colors: &'a UiColors,
     hint_alignment: &'a HintAlignment,
     hint_style: Option<HintStyle>,
@@ -28,6 +29,7 @@ impl<'a> Ui<'a> {
         model: &'a mut model::Model<'a>,
         unique_hint: bool,
         focus_wrap_around: bool,
+        default_output_destination: OutputDestination,
         rendering_colors: &'a UiColors,
         hint_alignment: &'a HintAlignment,
         hint_style: Option<HintStyle>,
@@ -47,6 +49,7 @@ impl<'a> Ui<'a> {
             lookup_trie,
             focus_index,
             focus_wrap_around,
+            default_output_destination,
             rendering_colors,
             hint_alignment,
             hint_style,
@@ -408,8 +411,9 @@ impl<'a> Ui<'a> {
             return Event::Exit;
         }
 
-        let mut uppercased = false;
         let mut typed_hint = String::new();
+        let mut uppercased = false;
+        let mut output_destination = self.default_output_destination.clone();
 
         self.full_render(writer);
 
@@ -471,11 +475,28 @@ impl<'a> Ui<'a> {
                 // Yank/copy
                 event::Key::Char(_ch @ 'y') | event::Key::Char(_ch @ '\n') => {
                     let text = self.matches.get(self.focus_index).unwrap().text;
-                    return Event::Match((text.to_string(), false));
+                    return Event::Match(Selection {
+                        text: text.to_string(),
+                        uppercased: false,
+                        output_destination,
+                    });
                 }
                 event::Key::Char(_ch @ 'Y') => {
                     let text = self.matches.get(self.focus_index).unwrap().text;
-                    return Event::Match((text.to_string(), true));
+                    return Event::Match(Selection {
+                        text: text.to_string(),
+                        uppercased: true,
+                        output_destination,
+                    });
+                }
+
+                event::Key::Char(_ch @ ' ') => {
+                    output_destination.toggle();
+                    let message = format!("output destination: `{}`", output_destination);
+                    let args = vec!["display-message", &message];
+                    process::execute("tmux", &args)
+                        .expect("could not make tmux display the message.");
+                    continue;
                 }
 
                 // Use a Trie or another data structure to determine
@@ -496,7 +517,7 @@ impl<'a> Ui<'a> {
                         .get_node(&typed_hint.chars().collect::<Vec<char>>());
 
                     if node.is_none() {
-                        // An unknown key was entered.
+                        // A key outside the alphabet was entered.
                         return Event::Exit;
                     }
 
@@ -508,7 +529,11 @@ impl<'a> Ui<'a> {
                         );
                         let mat = self.matches.get(*match_index).expect("By construction, the value in a leaf should correspond to an existing hint.");
                         let text = mat.text.to_string();
-                        return Event::Match((text, uppercased));
+                        return Event::Match(Selection {
+                            text,
+                            uppercased,
+                            output_destination,
+                        });
                     } else {
                         // The prefix of a hint was entered, but we
                         // still need more keys.
@@ -530,7 +555,7 @@ impl<'a> Ui<'a> {
     ///
     /// - Setup steps: switch to alternate screen, switch to raw mode, hide the cursor.
     /// - Teardown steps: show cursor, back to main screen.
-    pub fn present(&mut self) -> Option<(String, bool)> {
+    pub fn present(&mut self) -> Option<Selection> {
         use std::io::Write;
         use termion::raw::IntoRawMode;
         use termion::screen::AlternateScreen;
@@ -546,7 +571,7 @@ impl<'a> Ui<'a> {
 
         let selection = match self.listen(&mut stdin, &mut stdout) {
             Event::Exit => None,
-            Event::Match((text, uppercased)) => Some((text, uppercased)),
+            Event::Match(selection) => Some(selection),
         };
 
         write!(stdout, "{}", cursor::Show).unwrap();
@@ -623,7 +648,7 @@ enum Event {
     /// Exit with no selected matches,
     Exit,
     /// A vector of matched text and whether it was selected with uppercase.
-    Match((String, bool)),
+    Match(Selection),
 }
 
 #[cfg(test)]
@@ -915,6 +940,7 @@ Barcelona https://en.wikipedia.org/wiki/Barcelona -   ";
             lookup_trie: SequenceTrie::new(),
             focus_index: 0,
             focus_wrap_around: false,
+            default_output_destination: OutputDestination::Tmux,
             rendering_colors: &rendering_colors,
             hint_alignment: &hint_alignment,
             hint_style: None,
@@ -968,6 +994,7 @@ Barcelona https://en.wikipedia.org/wiki/Barcelona -   ";
         );
         let unique_hint = false;
         let wrap_around = false;
+        let default_output_destination = OutputDestination::Tmux;
 
         let rendering_colors = UiColors {
             text_fg: Box::new(color::Black),
@@ -986,6 +1013,7 @@ Barcelona https://en.wikipedia.org/wiki/Barcelona -   ";
             &mut model,
             unique_hint,
             wrap_around,
+            default_output_destination,
             &rendering_colors,
             &hint_alignment,
             hint_style,