handy

handy
hand‧y S3 /ˈhændi/ adjective (comparative handier, superlative handiest)1. useful:
    It’s quite a handy little tool.
    It’s very handy having a light above your desk.
    Take your swimming trunks with you – they might come in handy (=be useful).
2. informal near and easy to reach:
    I always keep my gun handy just in case.
    Do you have a piece of paper handy?
    handy for British English:
    The house was in Drury Lane, very handy for the theatre.
3. good at using something, especially a tool
    handy with
    He’s very handy with a screwdriver.
     

THESAURUS

   ▪ useful something that is useful makes it easier for you to do something: He gave me some useful advice. | a useful thing to know
   ▪ handy informal useful – used especially about something that is convenient and easy to use: a handy little booklet | The book is full of handy hints. | I always keep old jars – you never know when they might come in handy (=be useful).
   ▪ helpful useful because it helps you to do something: This drug can be helpful in treating depression. | helpful advice | helpful suggestions
   ▪ of use [not before noun] if someone or something is of use, they are useful for you when you are doing something: I hope you’ll find the book of use. | He wants to be of use.
   ▪ worthwhile if doing something is worthwhile, it is useful for you and you benefit from doing it: The training was certainly worthwhile. | a worthwhile experience | It is worthwhile to start by asking ourselves why people get involved in crime.

Handy
Handy, W.C.
(1873–1958) a US jazz musician and writer of jazz songs, thought to be the first person to write BLUES music. He is especially known for his song St Louis Blues.