diff --git a/src/bank.rs b/src/bank.rs
index 09b7ac8191..ff0e6d56ab 100644
--- a/src/bank.rs
+++ b/src/bank.rs
@@ -819,7 +819,7 @@ impl Bank {
         // It's up to the contract to implement its own rules on moving funds
         if system_program::check_id(&program_id) {
             if let Err(err) =
-                system_program::process_transaction(&tx, instruction_index, program_accounts)
+                system_program::process_instruction(&tx, instruction_index, program_accounts)
             {
                 let err = match err {
                     system_program::Error::ResultWithNegativeTokens(i) => {
@@ -830,19 +830,19 @@ impl Bank {
                 return Err(err);
             }
         } else if budget_program::check_id(&program_id) {
-            if budget_program::process_transaction(&tx, instruction_index, program_accounts)
+            if budget_program::process_instruction(&tx, instruction_index, program_accounts)
                 .is_err()
             {
                 return Err(BankError::ProgramRuntimeError(instruction_index as u8));
             }
         } else if storage_program::check_id(&program_id) {
-            if storage_program::process_transaction(&tx, instruction_index, program_accounts)
+            if storage_program::process_instruction(&tx, instruction_index, program_accounts)
                 .is_err()
             {
                 return Err(BankError::ProgramRuntimeError(instruction_index as u8));
             }
         } else if vote_program::check_id(&program_id) {
-            if vote_program::process_transaction(&tx, instruction_index, program_accounts).is_err()
+            if vote_program::process_instruction(&tx, instruction_index, program_accounts).is_err()
             {
                 return Err(BankError::ProgramRuntimeError(instruction_index as u8));
             }
diff --git a/src/budget_program.rs b/src/budget_program.rs
index e7c729efa0..3e1c94a943 100644
--- a/src/budget_program.rs
+++ b/src/budget_program.rs
@@ -116,13 +116,13 @@ fn apply_debits(
 /// * accounts[0] - The source of the tokens
 /// * accounts[1] - The contract context.  Once the contract has been completed, the tokens can
 /// be spent from this account .
-pub fn process_transaction(
+pub fn process_instruction(
     tx: &Transaction,
     instruction_index: usize,
     accounts: &mut [&mut Account],
 ) -> Result<(), BudgetError> {
     if let Ok(instruction) = deserialize(tx.userdata(instruction_index)) {
-        trace!("process_transaction: {:?}", instruction);
+        trace!("process_instruction: {:?}", instruction);
         apply_debits(tx, instruction_index, accounts, &instruction)
     } else {
         info!(
@@ -264,7 +264,7 @@ mod test {
 
     fn process_transaction(tx: &Transaction, accounts: &mut [Account]) -> Result<(), BudgetError> {
         let mut refs: Vec<&mut Account> = accounts.iter_mut().collect();
-        super::process_transaction(&tx, 0, &mut refs[..])
+        super::process_instruction(&tx, 0, &mut refs[..])
     }
     #[test]
     fn test_serializer() {
diff --git a/src/storage_program.rs b/src/storage_program.rs
index dd46deaa40..991bd04747 100644
--- a/src/storage_program.rs
+++ b/src/storage_program.rs
@@ -34,7 +34,7 @@ pub fn get_balance(account: &Account) -> u64 {
     account.tokens
 }
 
-pub fn process_transaction(
+pub fn process_instruction(
     tx: &Transaction,
     pix: usize,
     _accounts: &mut [&mut Account],
@@ -61,6 +61,6 @@ mod test {
     fn test_storage_tx() {
         let keypair = Keypair::new();
         let tx = Transaction::new(&keypair, &[], id(), &(), Default::default(), 0);
-        assert!(process_transaction(&tx, 0, &mut []).is_err());
+        assert!(process_instruction(&tx, 0, &mut []).is_err());
     }
 }
diff --git a/src/system_program.rs b/src/system_program.rs
index cbfb1c1b93..9c5b8fd606 100644
--- a/src/system_program.rs
+++ b/src/system_program.rs
@@ -35,13 +35,13 @@ pub fn id() -> Pubkey {
 pub fn get_balance(account: &Account) -> u64 {
     account.tokens
 }
-pub fn process_transaction(
+pub fn process_instruction(
     tx: &Transaction,
     pix: usize,
     accounts: &mut [&mut Account],
 ) -> Result<()> {
     if let Ok(syscall) = deserialize(tx.userdata(pix)) {
-        trace!("process_transaction: {:?}", syscall);
+        trace!("process_instruction: {:?}", syscall);
         match syscall {
             SystemInstruction::CreateAccount {
                 tokens,
@@ -111,7 +111,7 @@ mod test {
 
     fn process_transaction(tx: &Transaction, accounts: &mut [Account]) -> Result<()> {
         let mut refs: Vec<&mut Account> = accounts.iter_mut().collect();
-        super::process_transaction(&tx, 0, &mut refs[..])
+        super::process_instruction(&tx, 0, &mut refs[..])
     }
 
     #[test]
diff --git a/src/vote_program.rs b/src/vote_program.rs
index 7e9289a41e..d5a2b25214 100644
--- a/src/vote_program.rs
+++ b/src/vote_program.rs
@@ -64,7 +64,7 @@ pub fn id() -> Pubkey {
     Pubkey::new(&VOTE_PROGRAM_ID)
 }
 
-pub fn process_transaction(
+pub fn process_instruction(
     tx: &Transaction,
     instruction_index: usize,
     accounts: &mut [&mut Account],