diff --git a/.vscode/cspell.dictionaries/jargon.wordlist.txt b/.vscode/cspell.dictionaries/jargon.wordlist.txt
index 38abc75b1..232266427 100644
--- a/.vscode/cspell.dictionaries/jargon.wordlist.txt
+++ b/.vscode/cspell.dictionaries/jargon.wordlist.txt
@@ -59,7 +59,13 @@ microbenchmarking
 multibyte
 multicall
 noatime
+nocache
 nocreat
+noctty
+noerror
+nofollow
+nolinks
+nonblock
 nonportable
 nonprinting
 notrunc
@@ -86,6 +92,8 @@ semiprime
 semiprimes
 shortcode
 shortcodes
+siginfo
+sigusr
 subcommand
 subexpression
 submodule
diff --git a/src/uu/dd/src/datastructures.rs b/src/uu/dd/src/datastructures.rs
index 6f2b16d67..b4410d210 100644
--- a/src/uu/dd/src/datastructures.rs
+++ b/src/uu/dd/src/datastructures.rs
@@ -4,6 +4,7 @@
 //
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
+// spell-checker:ignore ctable, outfile
 
 use crate::conversion_tables::*;
 
diff --git a/src/uu/dd/src/dd.rs b/src/uu/dd/src/dd.rs
index ef250c67c..faedb20eb 100644
--- a/src/uu/dd/src/dd.rs
+++ b/src/uu/dd/src/dd.rs
@@ -5,7 +5,7 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
-// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, availible, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
+// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
 
 #[macro_use]
 extern crate uucore;
@@ -47,6 +47,7 @@ const ABOUT: &str = "copy, and optionally convert, a file system resource";
 const BUF_INIT_BYTE: u8 = 0xDD;
 const RTN_SUCCESS: i32 = 0;
 const RTN_FAILURE: i32 = 1;
+const SYSTEM_NEWLINE: &[u8] = if cfg!(target_os = "windows") { b"\r\n" } else { b"\n" };
 
 struct Input<R: Read> {
     src: R,
@@ -489,9 +490,18 @@ impl Output<File> {
 /// Expects ascii encoded data
 fn block(buf: Vec<u8>, cbs: usize, rstat: &mut ReadStat) -> Vec<Vec<u8>> {
     let mut blocks = buf
-        .split(|&e| e == b'\n')
-        .fold(Vec::new(), |mut blocks, split| {
-            let mut split = split.to_vec();
+        .split(| &e | e == b'\n')
+        .map(| split | {
+            if cfg!(target_os = "windows") {
+                // Since newlines are LF ('\n') in Unix and CR+LF ("\r\n") on Windows,
+                // the split above will leave a trailing CR on Windows.
+                // This must be removed before proceeding.
+                split[..split.len()-1].to_vec()
+            } else {
+                split.to_vec()
+            }
+        })
+        .fold(Vec::new(), |mut blocks, mut split| {
             if split.len() > cbs {
                 rstat.records_truncated += 1;
             }
@@ -516,14 +526,11 @@ fn block(buf: Vec<u8>, cbs: usize, rstat: &mut ReadStat) -> Vec<Vec<u8>> {
 fn unblock(buf: Vec<u8>, cbs: usize) -> Vec<u8> {
     buf.chunks(cbs).fold(Vec::new(), |mut acc, block| {
         if let Some(last_char_idx) = block.iter().rposition(|&e| e != b' ') {
-            // Find last space
+            // Include text up to last space.
             acc.extend(&block[..=last_char_idx]);
-            acc.push(b'\n');
-        } else {
-            // The block is filled with only spaces
-            acc.push(b'\n');
-        };
+        }
 
+        acc.extend(SYSTEM_NEWLINE);
         acc
     })
 }
@@ -627,7 +634,7 @@ fn conv_block_unblock_helper<R: Read>(
     }
 }
 
-/// Read helper performs read operations common to all dd reads, and dispatches the buffer to relevent helper functions as dictated by the operations requested by the user.
+/// Read helper performs read operations common to all dd reads, and dispatches the buffer to relevant helper functions as dictated by the operations requested by the user.
 fn read_helper<R: Read>(
     i: &mut Input<R>,
     bsize: usize,
@@ -738,12 +745,8 @@ fn gen_prog_updater(rx: mpsc::Receiver<ProgUpdate>, print_level: Option<StatusLe
     fn posixly_correct() -> bool {
         env::var("POSIXLY_CORRECT").is_ok()
     }
-    // Since signal-prompted progress printing is only availible on Linux so far, we allow unused
-    // variables to remove build warnings on Windows and other platforms.
-    // Remove when possible.
-    #[allow(unused_variables)]
-    fn register_signal_handlers(sigval: Arc<AtomicUsize>) -> Result<(), Box<dyn Error>> {
-        #[cfg(target_os = "linux")]
+    #[cfg(target_os = "linux")]
+    fn register_linux_signal_handler(sigval: Arc<AtomicUsize>) -> Result<(), Box<dyn Error>> {
         if !posixly_correct() {
             signal_hook::flag::register_usize(signal::SIGUSR1, sigval, SIGUSR1_USIZE)?;
         }
@@ -752,9 +755,11 @@ fn gen_prog_updater(rx: mpsc::Receiver<ProgUpdate>, print_level: Option<StatusLe
     }
     // --------------------------------------------------------------
     move || {
+        #[cfg(target_os = "linux")]
         let sigval = Arc::new(AtomicUsize::new(0));
 
-        register_signal_handlers(sigval.clone()).unwrap_or_else(|e| {
+        #[cfg(target_os = "linux")]
+        register_linux_signal_handler(sigval.clone()).unwrap_or_else(|e| {
             if Some(StatusLevel::None) != print_level {
                 eprintln!(
                     "Internal dd Warning: Unable to register signal handler \n\t{}",
diff --git a/src/uu/dd/src/dd_unit_tests/block_unblock_tests.rs b/src/uu/dd/src/dd_unit_tests/block_unblock_tests.rs
index 5ed15e876..457322b25 100644
--- a/src/uu/dd/src/dd_unit_tests/block_unblock_tests.rs
+++ b/src/uu/dd/src/dd_unit_tests/block_unblock_tests.rs
@@ -1,4 +1,4 @@
-// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, availible, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
+// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
 
 use super::*;
 
diff --git a/src/uu/dd/src/dd_unit_tests/conv_sync_tests.rs b/src/uu/dd/src/dd_unit_tests/conv_sync_tests.rs
index 63dd1404c..904a97cf5 100644
--- a/src/uu/dd/src/dd_unit_tests/conv_sync_tests.rs
+++ b/src/uu/dd/src/dd_unit_tests/conv_sync_tests.rs
@@ -1,4 +1,4 @@
-// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, availible, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
+// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
 
 use super::*;
 
diff --git a/src/uu/dd/src/dd_unit_tests/conversion_tests.rs b/src/uu/dd/src/dd_unit_tests/conversion_tests.rs
index 1c9c31013..c4515d3a2 100644
--- a/src/uu/dd/src/dd_unit_tests/conversion_tests.rs
+++ b/src/uu/dd/src/dd_unit_tests/conversion_tests.rs
@@ -1,4 +1,4 @@
-// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, availible, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
+// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
 
 use super::*;
 
diff --git a/src/uu/dd/src/dd_unit_tests/mod.rs b/src/uu/dd/src/dd_unit_tests/mod.rs
index e802c4534..27b5a18ad 100644
--- a/src/uu/dd/src/dd_unit_tests/mod.rs
+++ b/src/uu/dd/src/dd_unit_tests/mod.rs
@@ -1,4 +1,4 @@
-// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, availible, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
+// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
 
 use super::*;
 
diff --git a/src/uu/dd/src/dd_unit_tests/sanity_tests.rs b/src/uu/dd/src/dd_unit_tests/sanity_tests.rs
index efb542eb5..edf25fe5d 100644
--- a/src/uu/dd/src/dd_unit_tests/sanity_tests.rs
+++ b/src/uu/dd/src/dd_unit_tests/sanity_tests.rs
@@ -1,4 +1,4 @@
-// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, availible, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
+// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
 
 use super::*;
 
diff --git a/src/uu/dd/src/parseargs.rs b/src/uu/dd/src/parseargs.rs
index a27ab3cb0..3683023ac 100644
--- a/src/uu/dd/src/parseargs.rs
+++ b/src/uu/dd/src/parseargs.rs
@@ -4,6 +4,7 @@
 //
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
+// spell-checker:ignore ctty, ctable, iconvflags, oconvflags
 
 #[cfg(test)]
 mod unit_tests;
diff --git a/src/uu/dd/src/parseargs/unit_tests.rs b/src/uu/dd/src/parseargs/unit_tests.rs
index f8cdef4e9..d4d74f58f 100644
--- a/src/uu/dd/src/parseargs/unit_tests.rs
+++ b/src/uu/dd/src/parseargs/unit_tests.rs
@@ -1,4 +1,4 @@
-// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, availible, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
+// spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat
 
 use super::*;