diff --git a/core/byte-vectors/byte-vectors-docs.factor b/core/byte-vectors/byte-vectors-docs.factor
deleted file mode 100644
index 3873f73bfe..0000000000
--- a/core/byte-vectors/byte-vectors-docs.factor
+++ /dev/null
@@ -1,37 +0,0 @@
-USING: arrays byte-arrays help.markup help.syntax kernel
-byte-vectors.private combinators ;
-IN: byte-vectors
-
-ARTICLE: "byte-vectors" "Byte vectors"
-"A byte vector is a resizable mutable sequence of unsigned bytes. Byte vector words are found in the " { $vocab-link "byte-vectors" } " vocabulary."
-$nl
-"Byte vectors form a class:"
-{ $subsection byte-vector }
-{ $subsection byte-vector? }
-"Creating byte vectors:"
-{ $subsection >byte-vector }
-{ $subsection <byte-vector> }
-"Literal syntax:"
-{ $subsection POSTPONE: BV{ }
-"If you don't care about initial capacity, a more elegant way to create a new byte vector is to write:"
-{ $code "BV{ } clone" } ;
-
-ABOUT: "byte-vectors"
-
-HELP: byte-vector
-{ $description "The class of resizable byte vectors. See " { $link "byte-vectors" } " for information." } ;
-
-HELP: <byte-vector>
-{ $values { "n" "a positive integer specifying initial capacity" } { "byte-vector" byte-vector } }
-{ $description "Creates a new byte vector that can hold " { $snippet "n" } " bytes before resizing." } ;
-
-HELP: >byte-vector
-{ $values { "seq" "a sequence" } { "byte-vector" byte-vector } }
-{ $description "Outputs a freshly-allocated byte vector with the same elements as a given sequence." }
-{ $errors "Throws an error if the sequence contains elements other than integers." } ;
-
-HELP: BV{
-{ $syntax "BV{ elements... }" }
-{ $values { "elements" "a list of bytes" } }
-{ $description "Marks the beginning of a literal byte vector. Literal byte vectors are terminated by " { $link POSTPONE: } } "." } 
-{ $examples { $code "BV{ 1 2 3 12 }" } } ;
diff --git a/core/byte-vectors/byte-vectors-tests.factor b/core/byte-vectors/byte-vectors-tests.factor
deleted file mode 100644
index 9a100d9795..0000000000
--- a/core/byte-vectors/byte-vectors-tests.factor
+++ /dev/null
@@ -1,17 +0,0 @@
-IN: byte-vectors.tests
-USING: tools.test byte-vectors vectors sequences kernel
-prettyprint ;
-
-[ 0 ] [ 123 <byte-vector> length ] unit-test
-
-: do-it
-    123 [ over push ] each ;
-
-[ t ] [
-    3 <byte-vector> do-it
-    3 <vector> do-it sequence=
-] unit-test
-
-[ t ] [ BV{ } byte-vector? ] unit-test
-
-[ "BV{ }" ] [ BV{ } unparse ] unit-test
diff --git a/core/byte-vectors/byte-vectors.factor b/core/byte-vectors/byte-vectors.factor
deleted file mode 100644
index 6938d02b2f..0000000000
--- a/core/byte-vectors/byte-vectors.factor
+++ /dev/null
@@ -1,44 +0,0 @@
-! Copyright (C) 2008 Slava Pestov.
-! See http://factorcode.org/license.txt for BSD license.
-USING: arrays kernel kernel.private math sequences
-sequences.private growable byte-arrays accessors ;
-IN: byte-vectors
-
-TUPLE: byte-vector
-{ underlying byte-array }
-{ length array-capacity } ;
-
-: <byte-vector> ( n -- byte-vector )
-    <byte-array> 0 byte-vector boa ; inline
-
-: >byte-vector ( seq -- byte-vector )
-    T{ byte-vector f B{ } 0 } clone-like ;
-
-M: byte-vector like
-    drop dup byte-vector? [
-        dup byte-array?
-        [ dup length byte-vector boa ] [ >byte-vector ] if
-    ] unless ;
-
-M: byte-vector new-sequence
-    drop [ <byte-array> ] [ >fixnum ] bi byte-vector boa ;
-
-M: byte-vector equal?
-    over byte-vector? [ sequence= ] [ 2drop f ] if ;
-
-M: byte-array like
-    #! If we have an byte-array, we're done.
-    #! If we have a byte-vector, and it's at full capacity,
-    #! we're done. Otherwise, call resize-byte-array, which is a
-    #! relatively fast primitive.
-    drop dup byte-array? [
-        dup byte-vector? [
-            [ length ] [ underlying>> ] bi
-            2dup length eq?
-            [ nip ] [ resize-byte-array ] if
-        ] [ >byte-array ] if
-    ] unless ;
-
-M: byte-array new-resizable drop <byte-vector> ;
-
-INSTANCE: byte-vector growable
diff --git a/core/byte-vectors/summary.txt b/core/byte-vectors/summary.txt
deleted file mode 100644
index e914ebb319..0000000000
--- a/core/byte-vectors/summary.txt
+++ /dev/null
@@ -1 +0,0 @@
-Growable byte arrays
diff --git a/core/byte-vectors/tags.txt b/core/byte-vectors/tags.txt
deleted file mode 100644
index 42d711b32b..0000000000
--- a/core/byte-vectors/tags.txt
+++ /dev/null
@@ -1 +0,0 @@
-collections
diff --git a/core/io/streams/byte-array/byte-array-docs.factor b/core/io/streams/byte-array/byte-array-docs.factor
deleted file mode 100644
index 7b27621343..0000000000
--- a/core/io/streams/byte-array/byte-array-docs.factor
+++ /dev/null
@@ -1,34 +0,0 @@
-USING: help.syntax help.markup io byte-arrays quotations ;
-IN: io.streams.byte-array
-
-ABOUT: "io.streams.byte-array"
-
-ARTICLE: "io.streams.byte-array" "Byte-array streams"
-"Byte array streams:"
-{ $subsection <byte-reader> }
-{ $subsection <byte-writer> }
-"Utility combinators:"
-{ $subsection with-byte-reader }
-{ $subsection with-byte-writer } ;
-
-HELP: <byte-reader>
-{ $values { "byte-array" byte-array }
-    { "encoding" "an encoding descriptor" }
-    { "stream" "a new byte reader" } }
-{ $description "Creates an input stream reading from a byte array using an encoding." } ;
-
-HELP: <byte-writer>
-{ $values { "encoding" "an encoding descriptor" }
-    { "stream" "a new byte writer" } }
-{ $description "Creates an output stream writing data to a byte array using an encoding." } ;
-
-HELP: with-byte-reader
-{ $values { "encoding" "an encoding descriptor" }
-    { "quot" quotation } { "byte-array" byte-array } }
-{ $description "Calls the quotation in a new dynamic scope with " { $link input-stream } " rebound to an input stream for reading from a byte array using an encoding." } ;
-
-HELP: with-byte-writer
-{ $values  { "encoding" "an encoding descriptor" }
-    { "quot" quotation }
-    { "byte-array" byte-array } }
-{ $description "Calls the quotation in a new dynamic scope with " { $link output-stream } " rebound to an output stream writing data to a byte array using an encoding." } ;
diff --git a/core/io/streams/byte-array/byte-array-tests.factor b/core/io/streams/byte-array/byte-array-tests.factor
deleted file mode 100644
index 77a9126740..0000000000
--- a/core/io/streams/byte-array/byte-array-tests.factor
+++ /dev/null
@@ -1,9 +0,0 @@
-USING: tools.test io.streams.byte-array io.encodings.binary
-io.encodings.utf8 io kernel arrays strings ;
-
-[ B{ 1 2 3 } ] [ binary [ { 1 2 3 } write ] with-byte-writer ] unit-test
-[ B{ 1 2 3 } ] [ { 1 2 3 } binary [ 3 read ] with-byte-reader ] unit-test
-
-[ B{ BIN: 11110101 BIN: 10111111 BIN: 10000000 BIN: 10111111 BIN: 11101111 BIN: 10000000 BIN: 10111111 BIN: 11011111 BIN: 10000000 CHAR: x } ]
-[ { BIN: 101111111000000111111 BIN: 1111000000111111 BIN: 11111000000 CHAR: x } utf8 [ write ] with-byte-writer ] unit-test
-[ { BIN: 101111111000000111111 } t ] [ { BIN: 11110101 BIN: 10111111 BIN: 10000000 BIN: 10111111 } utf8 <byte-reader> contents dup >array swap string? ] unit-test
diff --git a/core/io/streams/byte-array/byte-array.factor b/core/io/streams/byte-array/byte-array.factor
deleted file mode 100644
index 9d89c3d814..0000000000
--- a/core/io/streams/byte-array/byte-array.factor
+++ /dev/null
@@ -1,16 +0,0 @@
-USING: byte-arrays byte-vectors kernel io.encodings io.streams.string
-sequences io namespaces io.encodings.private accessors ;
-IN: io.streams.byte-array
-
-: <byte-writer> ( encoding -- stream )
-    512 <byte-vector> swap <encoder> ;
-
-: with-byte-writer ( encoding quot -- byte-array )
-    [ <byte-writer> ] dip [ output-stream get ] compose with-output-stream*
-    dup encoder? [ stream>> ] when >byte-array ; inline
-
-: <byte-reader> ( byte-array encoding -- stream )
-    [ >byte-vector dup reverse-here ] dip <decoder> ;
-
-: with-byte-reader ( byte-array encoding quot -- )
-    [ <byte-reader> ] dip with-input-stream* ; inline