diff --git a/core/src/main/java/org/bitcoinj/core/Context.java b/core/src/main/java/org/bitcoinj/core/Context.java
index 27776d2c0..aed7b35e6 100644
--- a/core/src/main/java/org/bitcoinj/core/Context.java
+++ b/core/src/main/java/org/bitcoinj/core/Context.java
@@ -25,7 +25,7 @@ import org.slf4j.LoggerFactory;
 import java.util.Objects;
 
 // TODO: Finish adding Context c'tors to all the different objects so we can start deprecating the versions that take NetworkParameters.
-// TODO: Add a working directory notion to Context and make various subsystems that want to use files default to that directory (eg. Orchid, block stores, wallet, etc).
+// TODO: Add a working directory notion to Context and make various subsystems that want to use files default to that directory (e.g. Orchid, block stores, wallet, etc).
 // TODO: Auto-register the block chain object here, and then use it in the (newly deprecated) TransactionConfidence.getDepthInBlocks() method: the new version should take an AbstractBlockChain specifically.
 //       Also use the block chain object reference from the context in PeerGroup and remove the other constructors, as it's easy to forget to wire things up.
 // TODO: Move Threading.USER_THREAD to here and leave behind just a source code stub. Allow different instantiations of the library to use different user threads.
diff --git a/core/src/main/java/org/bitcoinj/crypto/HDKeyDerivation.java b/core/src/main/java/org/bitcoinj/crypto/HDKeyDerivation.java
index b530d305d..c00163f92 100644
--- a/core/src/main/java/org/bitcoinj/crypto/HDKeyDerivation.java
+++ b/core/src/main/java/org/bitcoinj/crypto/HDKeyDerivation.java
@@ -138,7 +138,7 @@ public final class HDKeyDerivation {
 
     /**
      * @throws HDDerivationException if private derivation is attempted for a public-only parent key, or
-     * if the resulting derived key is invalid (eg. private key == 0).
+     * if the resulting derived key is invalid (e.g. private key == 0).
      */
     public static DeterministicKey deriveChildKey(DeterministicKey parent, ChildNumber childNumber) throws HDDerivationException {
         if (!parent.hasPrivKey())
diff --git a/core/src/main/java/org/bitcoinj/wallet/KeyChainGroupStructure.java b/core/src/main/java/org/bitcoinj/wallet/KeyChainGroupStructure.java
index cc50a8b2f..6ede307b0 100644
--- a/core/src/main/java/org/bitcoinj/wallet/KeyChainGroupStructure.java
+++ b/core/src/main/java/org/bitcoinj/wallet/KeyChainGroupStructure.java
@@ -115,7 +115,7 @@ public interface KeyChainGroupStructure {
 
     /**
      * Return coin type path component for a network id
-     * @param network network id string, eg. {@link BitcoinNetwork#ID_MAINNET}
+     * @param network network id string, e.g. {@link BitcoinNetwork#ID_MAINNET}
      */
     static ChildNumber coinType(Network network) {
         if (!(network instanceof BitcoinNetwork)) {