diff --git a/mps/manual/source/pool/amc.rst b/mps/manual/source/pool/amc.rst
index edd1dbd3e07..0562b9bce5a 100644
--- a/mps/manual/source/pool/amc.rst
+++ b/mps/manual/source/pool/amc.rst
@@ -128,8 +128,8 @@ AMC interface
       pointers` keep objects alive.
 
     * :c:macro:`MPS_KEY_EXTEND_BY` (type :c:type:`size_t`,
-      default 4096) is the default :term:`size` of segment that the pool will
-      request from the :term:`arena`.
+      default 4096) is the default :term:`size` of block that the pool
+      will request from the :term:`arena`.
 
     For example::
 
diff --git a/mps/manual/source/pool/mfs.rst b/mps/manual/source/pool/mfs.rst
index e130e3fcda4..c4501d05c54 100644
--- a/mps/manual/source/pool/mfs.rst
+++ b/mps/manual/source/pool/mfs.rst
@@ -89,12 +89,12 @@ MFS interface
 
     In addition, :c:func:`mps_pool_create_k` may take:
 
-    * :c:macro:`MPS_KEY_EXTEND_BY` (type :c:type:`size_t`, default 65536) is the
-      :term:`size` of segment that the pool will request from the
-      :term:`arena`. It must be at least as big as the unit size
-      specified by the :c:macro:`MPS_KEY_MFS_UNIT_SIZE` keyword
-      argument. If this is not a multiple of the unit size, there will
-      be wasted space in each segment.
+    * :c:macro:`MPS_KEY_EXTEND_BY` (type :c:type:`size_t`,
+      default 65536) is the :term:`size` of block that the pool will
+      request from the :term:`arena`. It must be at least as big as
+      the unit size specified by the :c:macro:`MPS_KEY_MFS_UNIT_SIZE`
+      keyword argument. If this is not a multiple of the unit size,
+      there will be wasted space in each block.
 
     For example::
 
@@ -106,7 +106,7 @@ MFS interface
 
     .. deprecated:: starting with version 1.112.
 
-        When using :c:func:`mps_pool_create`, pass the segment size and
+        When using :c:func:`mps_pool_create`, pass the block size and
         unit size like this::
 
             mps_res_t mps_pool_create(mps_pool_t *pool_o, mps_arena_t arena, 
diff --git a/mps/manual/source/pool/mv.rst b/mps/manual/source/pool/mv.rst
index 1e098ff5a63..8561e96d7d1 100644
--- a/mps/manual/source/pool/mv.rst
+++ b/mps/manual/source/pool/mv.rst
@@ -80,7 +80,7 @@ MV interface
       :c:func:`mps_free`, it will be rounded up to the pool's alignment.
 
     * :c:macro:`MPS_KEY_EXTEND_BY` (type :c:type:`size_t`,
-      default 65536) is the :term:`size` of segment that the pool will
+      default 65536) is the :term:`size` of block that the pool will
       request from the :term:`arena`.
 
     * :c:macro:`MPS_KEY_MEAN_SIZE` (type :c:type:`size_t`, default 32)
@@ -107,7 +107,7 @@ MV interface
 
     .. deprecated:: starting with version 1.112.
 
-        When using :c:func:`mps_pool_create`, pass the segment size,
+        When using :c:func:`mps_pool_create`, pass the block size,
         mean size, and maximum size like this::
 
             mps_res_t mps_pool_create(mps_pool_t *pool_o, mps_arena_t arena, 
diff --git a/mps/manual/source/pool/mvff.rst b/mps/manual/source/pool/mvff.rst
index 5dce87d5f3c..64c6a0c9c31 100644
--- a/mps/manual/source/pool/mvff.rst
+++ b/mps/manual/source/pool/mvff.rst
@@ -42,11 +42,6 @@ on the same pool, because the worst-fit policy of buffer filling will
 grab all the large blocks, leading to severe fragmentation. If you
 need both forms of allocation, use two separate pools.
 
-Note that buffered allocation can't allocate across segment boundaries
-(see :ref:`topic-allocation-point-implementation` for the technical
-reason). This can cause added external fragmentation if objects are
-allocated that are a significant fraction of the segment size.
-
 .. note::
 
     If you need to allocate large objects in an MVFF pool,
@@ -116,7 +111,7 @@ MVFF interface
     the following :term:`keyword arguments`:
 
     * :c:macro:`MPS_KEY_EXTEND_BY` (type :c:type:`size_t`, default
-      65536) is the :term:`size` of segment that the pool will request
+      65536) is the :term:`size` of block that the pool will request
       from the :term:`arena`.
 
     * :c:macro:`MPS_KEY_MEAN_SIZE` (type :c:type:`size_t`, default 32)
@@ -139,7 +134,7 @@ MVFF interface
       arena for use by other pools.
 
     * :c:macro:`MPS_KEY_MVFF_ARENA_HIGH` (type :c:type:`mps_bool_t`,
-      default false) determines whether new segments are acquired at high
+      default false) determines whether new blocks are acquired at high
       addresses (if true), or at low addresses (if false).
 
     * :c:macro:`MPS_KEY_MVFF_SLOT_HIGH` [#not-ap]_ (type :c:type:`mps_bool_t`,